logo
search icon

Best kids spy kit of 2025

Join the millions that have trusted Productpicks expert reviews and data-driven recommendations. Our curated Best kids spy kit of 2025 expertly vetted and reviewed by our professionals.

Advertiser disclosure

About our ranking

Written by Connor Manion

Updated November 24, 2025

Connor Manion
Connor Manion
Connor Manion is a University of Florida graduate living in the mountains of Northern Georgia. You can find his work among the pages of the Miami Herald, The Olympian, the Sun Herald, and the Fresno Bee. His writing covers a broad range of interests including health and fitness, home improvement, cooking, and pet care. In addition to writing, Connor tutors middle and high school students in math, English, and Economics.
Read More
Best Pick
1
9.8/10 (9,396)
1
NATIONAL GEOGRAPHIC Junior Metal Detector - Adjustable Metal Detector for Kids with 7.5" Waterproof Dual Coil, Lightweight Design Great for Treasure Hunting Beginners

national geographic junior metal detector

9.8/10 (9,396 reviews)
Educational and encourages interest in STEM
Easy to store and take on-the-go
Collapsible and weighs less than 1.4 lbs
A great gift for both boys and girls
Read Full Review
Check Price
amazon logo
Read More
national geographic junior metal detector
The waterproof dual coil of the National Geographic Junior Metal Detector ensures accuracy and can detect metal objects up to six inches deep, while the adjustable sensitivity helps to avoid false positives. Plus, the telescoping arm and padded arm strap are easy to adjust, making it suitable for kids of all sizes. For those looking for an educational as well as entertaining product, the learning guide that comes included will be invaluable. It provides in-depth information about metal detectors, how the coils work to detect metal underground, and other practical knowledge that is essential to any treasure hunting enthusiast.
Check Price
Best Junior Metal Detector
2
9.4/10 (2,163)
2
NATIONAL GEOGRAPHIC Stepping Stones for Kids – 10 Soft Durable, Encourage Toddler Balance & Gross Motor Skills, Indoor & Outdoor Toys, Balance Stones, Obstacle Course (Amazon Exclusive)

national geographic stepping stones

9.4/10 (2,163 reviews)
Includes 10 brightly colored stones
Educational and encourages interest in STEM
Improves balance and coordination
Awarded the 2019 Toy of the Year Award
Read Full Review
50+ bought in past month
Check Price
amazon logo
Read More
national geographic stepping stones
National Geographic delivers a great toddler activity that encourages imagination, active playtime, and the development of gross motor skills with these colorful stepping stones. The unique foam formula is both durable and flexible, making this a reliable and long-lasting toy. The lightweight stones are soft to the touch and perfect for indoor or outdoor use. Use them to create fun obstacles and encourage your child’s creativity and growth.
Check Price
Best Toddler Obstacle Course
3
9.2/10 (6,661)
3
NATIONAL GEOGRAPHIC Metal Detector Accessories – Includes Sand Scoop for Metal Detecting and Metal Detector Shovel, Use as Sand Sifter for The Beach, Metal Detecting Accessories

national geographic metal detector accessories

9.2/10 (6,661 reviews)
Toys are easy to clean
Made of durable materials
Lightweight and portable
Can be used for snow too
Read Full Review
200+ bought in past month
Check Price
amazon logo
Read More
national geographic metal detector accessories
National Geographic is known for its interesting shows and magazines about nature and the earth. Their line of scientific toys makes playtime more fun for your child and allows them to learn and this sand shovel set is no exception. This sand scoop set will help your little adventure discover little treasures buried in the sand. It comes with a trowel that you can use to scoop sand up and shake it out so that only solids like rocks are remaining. You can use the shovel to dig around in sand or dirt and scoop it into the trowel. Toys like these encourage your child to be curious and creative. This hands-on toy is also a great addition to metal detector kits which are fun to use at the beach. Both the tools are lightweight and are made of durable plastic that will last a long time, making it the best shovel set on the list.
Check Price
4
9/10 (29,001)
4
National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults

National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults

9/10 (29,001 reviews)
Operation Mode: Automatic Motor
Grits: Comes with four polishing grits
Gemstones: Includes nine types of real gemstones
Sound: Offers quiet operation
Read Full Review
3k+ bought in past month
Check Price
amazon logo
Read More
National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
National Geographic's rock polisher turns ordinary rocks into stunning gemstones, making it a fun and educational experience for both kids and adults. We selected this tumbler for its durable motor, which ensures long-lasting performance, and we especially like how the leak-proof rubber barrel reduces noise by 75% compared to other plastic models. The kit comes with everything you need to get started: Four polishing grits, nine types of real rough gemstones, and a full-color learning guide.
Check Price
Save 20%
5
8.6/10 (18,147)
5
NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies

national geographic rock tumbler grit refill kit

8.6/10 (18,147 reviews)
HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more!
EASY TO USE, FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish!
COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies.
EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure.
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!
Read Full Review
1k+ bought in past month
Check Price
amazon logo
Read More
national geographic rock tumbler grit refill kit
HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more!,EASY TO USE, FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish!,COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies.,EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure.,AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!
Check Price
Save 16%
6
8.4/10 (10,868)
6
National Geographic Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks & Crystals for Kids (Amazon Exclusive)

national geographic starter rock tumbler kit

8.4/10 (10,868 reviews)
Great for beginners and kids
Noise dampening rock barrel
Built to last for years
Educational guide included
Read Full Review
1k+ bought in past month
Check Price
amazon logo
Read More
national geographic starter rock tumbler kit
The National Geographic Starter Rock Tumbling Kit offers an exciting and educational way to start rock tumbling as a hobby. From the durable, leak-proof tumbler barrel lined with rubber for reduced noise to the complete kit that contains half a pound of rough rocks with nine different types of gemstones along with jewelry fastenings and the four-stage rock polishing grit, this product provides everything you need to get started. Easy to read instructions and a full-color learning guide make getting started a breeze - and it is a great way to teach kids about the process of turning rough rocks into polished gemstones. With its durable motor, this tumbler can withstand multiple batches of rocks while still allowing for quieter operation. Plus, it comes with a sturdy tumbler base that resists vibrations and ensures better performance and longer operation. Not only is it fun to use, but it’s also immensely educational as kids get to learn about the process of tumbling rocks, how rocks are naturally polished, and the fascinating facts behind the gemstones they can create. This rock tumbling kit is an ideal choice for anyone looking for an engaging activity that involves both fun and education. It is an excellent way to get started on rock tumbling as a hobby, and makes a great STEM activity. With its durable construction and easy to use components, this kit is sure to provide hours of entertainment and learning.
Check Price
7
8.2/10 (4,843)
7
NATIONAL GEOGRAPHIC Rock Tumbler Kit - 1.36 kg Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Includes Rocks for Tumbling & Rock Polisher Grit, Rock Tumbler Machine for Adults and Kids

NATIONAL GEOGRAPHIC Rock Tumbler Kit - 1.36 kg Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Includes Rocks for Tumbling & Rock Polisher Grit, Rock Tumbler Machine for Adults and Kids

8.2/10 (4,843 reviews)
Barrel Capacity: 3 pounds
Item Weight: 8.14 pounds
Product Dimensions: 12.6" x 10.25" x 6.7"
Key Feature: Noise-reduced operation
Read Full Review
500+ bought in past month
Check Price
amazon logo
Read More
NATIONAL GEOGRAPHIC Rock Tumbler Kit - 1.36 kg Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Includes Rocks for Tumbling & Rock Polisher Grit, Rock Tumbler Machine for Adults and Kids
We love how the National Geographic Rock Tumbler Kit makes rock tumbling accessible and fun for both kids and adults. Its durable motor and time control settings simplify transforming rough stones into polished gems. The kit includes 3 pounds of raw rocks, nine gemstone varieties, and accessories like grit, a sieve, and GemFoam for a perfect shine. The leak-proof, stainless steel barrel runs quietly, making it great for beginners or seasoned rock collectors looking for a quieter, high-quality option.
Check Price
8
8/10 (2,331)
8
Blue Marble National Geographic Rock Tumbler Refill Kit – 3 lbs. of Rough Gemstones and Rocks for Tumbling Including Amethyst and Quartz – Rock Tumbler Supplies, Rock Tumbler Grit & Jewelry Settings

blue marble national geographic rock tumbler refill kit

8/10 (2,331 reviews)
Gemstones of nine varieties! Tigers Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Black Jasper. (3lb in total)
Four grades of grit. Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones!
Jewelry fastenings. 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring. Create custom jewelry from your newly polished gemstones!
Learning guide. Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts
AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!
Read Full Review
200+ bought in past month
Check Price
amazon logo
Read More
blue marble national geographic rock tumbler refill kit
Gemstones of nine varieties! Tigers Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Black Jasper. (3lb in total),Four grades of grit. Coarse, Medium, Fine, Polish. Transform your stones from rough rocks to dazzling gemstones!,Jewelry fastenings. 1 Necklace, 1 set of Earrings, 1 Keychain, 1 Ring. Create custom jewelry from your newly polished gemstones!,Learning guide. Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts,AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!
Check Price
9
7.8/10 (17,987)
9
Blue Marble National Geographic Rock Tumbler Media – The Ultimate Rock Polishing Supplies Kit, 4 Stage Bulk Grit, 1.5 Pounds of Ceramic Pellets, GemFoam Polishing Tumbling Media

blue marble national geographic rock tumbler media

7.8/10 (17,987 reviews)
QUALITY GRIT RESULTS IN A DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks, includes measuring scoop and storage containers with secure screw-top closures for easy storage
IMPROVE YOUR ROCK TUMBLING RESULTS Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches
BRAND NEW WAY TO MAKE TUMBLED ROCKS SHINE GemFoam is a unique new rock polisher media that gives unprecedented shine to tumbled rocks. Just add the patent-pending rock polishing media to your tumbler after the final grit cycle for great results!
WORKS WITH ANY ROCK TUMBLER The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results
HIGH-QUALITY EDUCATIONAL PRODUCTS - We're proud to make the highest quality hands-on science products, and all are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!
Read Full Review
600+ bought in past month
Check Price
amazon logo
Read More
blue marble national geographic rock tumbler media
QUALITY GRIT RESULTS IN A DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks, includes measuring scoop and storage containers with secure screw-top closures for easy storage,IMPROVE YOUR ROCK TUMBLING RESULTS Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches,BRAND NEW WAY TO MAKE TUMBLED ROCKS SHINE GemFoam is a unique new rock polisher media that gives unprecedented shine to tumbled rocks. Just add the patent-pending rock polishing media to your tumbler after the final grit cycle for great results!,WORKS WITH ANY ROCK TUMBLER The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results,HIGH-QUALITY EDUCATIONAL PRODUCTS - We're proud to make the highest quality hands-on science products, and all are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!
Check Price
10
7.6/10 (29,001)
10
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit

NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit

7.6/10 (29,001 reviews)
Barrel Capacity: 1 pound
Item Weight: 4.41 pounds
Product Dimensions: 13.11" x 5" x 8.15"
Key Feature: Easy to use
Read Full Review
1k+ bought in past month
Check Price
amazon logo
Read More
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults, Durable Noise-Reduced Barrel, Rocks, Grit & New GemFoam for a Shiny Finish, Cool Toys, Great STEM Hobby Kit
We recommend National Geographic's Hobby Rock Tumbler Kit for kids who love making jewelry. We love how this durable, user-friendly tumbler helps young geologists turn rough stones into beautiful gemstones with ease. The powerful motor and seven-day automatic shutoff make the process hassle-free. With ½ pound of rough rocks, nine gemstones, and five jewelry fastenings included, plus the added GemFoam for a brilliant finish, this kit is perfect for creative little ones exploring their jewelry-making talents.
Check Price
11
10/10 (501)
11
NATIONAL GEOGRAPHIC Spy Science Kit - Kids Spy Activity Set, Complete 10 Secret Missions with Gadgets for Kids and Gear, Detective Kit, Science Kits, Pretend Play

national geographic spy science kit

10/10 (501 reviews)
Includes invisible ink pen, UV light, and decoder wheel
Comes with required batteries
Suitable for children eight years old and up
Includes a notebook to track mission progress
Read Full Review
Check Price
amazon logo
Read More
national geographic spy science kit
With 10 different missions laid out and supplies to complete them included, this National Geographic Spy Science Kit allows your child to experience the thrill of spy work. The periscope is perfect for secretly looking around corners, and they can look both forwards and backward at the same time using the reflective spy glasses. The instruction guide lays out the details of each mission and provides a history of spy work. This educational set is a fun and creative way for your kids to develop their organization and observation skills.
Check Price
Your browser does not support the video tag.
blue marble
national geographic spy science kit
bag icon
national geographic spy science kit
media icon

Show all media

cross icon
play icon
play icon
Your browser does not support the video tag.
@blue marble
kids spy kit
cross icon
arrow icon
arrow icon
arrow icon
arrow icon
FAQ
Can multiple children participate in each mission?
Absolutely! They can even create their own missions in addition to the provided ones. This is a great way to encourage teamwork and innovative thinking.
national geographic spy science kit
national geographic spy science kit
Buying Guide
When it comes to rock tumbler kits, it can take time to narrow down your choices and determine which one is right for you. This guide highlights what to look for when choosing a rock tumbling for an adult. First, consider the type of rocks you'd like to polish. Different kits may be better suited to different types of rocks, so check the product descriptions and materials to see which type of rocks a kit is capable of polishing. Some rocks are harder than others, and some soft rocks can get broken if the tumbler doesn’t have a gentle setting. Rock tumblers generally have size limits to the rocks they can effectively polish. Larger rocks will require a larger tumbler and more grit, so make sure to check the size of the tumbler and the amount of grit included in the kit. You'll also want to consider the number of steps needed to polish your rocks. Some kits offer two-step tumbling which is easier and takes much less time, while others include up to six steps for a higher-quality finish. If you want to polish rocks to a lustrous shine, kits with more steps and different grains of grit will work better Finally, consider the price of the kit and whether or not it includes all the components you need to get started. Some kits may require you to purchase additional supplies, so make sure to research all of the components before making your purchase.
View Deal
On Amazon
national geographic spy science kit
national geographic spy science kit
blue marble
arrow icon
amazon logo
Shop
rating icon
rating icon
rating icon
rating icon
rating icon
9.9
Based on 501 reviews
Kids will enjoy playing with this National Geographic Spy Science Kit for hours. In the process, they’ll learn valuable hands-on STEM skills that will help them in the future.

Pros

  • Includes invisible ink pen, UV light, and decoder wheel
  • Comes with required batteries
  • Suitable for children eight years old and up
  • Includes a notebook to track mission progress
View Deal
On Amazon

Buying Guide

When it comes to rock tumbler kits, it can take time to narrow down your choices and determine which one is right for you. This guide highlights what to look for when choosing a rock tumbling for an adult. First, consider the type of rocks you'd like to polish. Different kits may be better suited to different types of rocks, so check the product descriptions and materials to see which type of rocks a kit is capable of polishing. Some rocks are harder than others, and some soft rocks can get broken if the tumbler doesn’t have a gentle setting. Rock tumblers generally have size limits to the rocks they can effectively polish. Larger rocks will require a larger tumbler and more grit, so make sure to check the size of the tumbler and the amount of grit included in the kit. You'll also want to consider the number of steps needed to polish your rocks. Some kits offer two-step tumbling which is easier and takes much less time, while others include up to six steps for a higher-quality finish. If you want to polish rocks to a lustrous shine, kits with more steps and different grains of grit will work better Finally, consider the price of the kit and whether or not it includes all the components you need to get started. Some kits may require you to purchase additional supplies, so make sure to research all of the components before making your purchase.
national geographic spy science kit
national geographic spy science kit

Best kids spy kit

1
NATIONAL GEOGRAPHIC Spy Science Kit - Kids Spy Activity Set, Complete 10 Secret Missions with Gadgets for Kids and Gear, Detective Kit, Science Kits, Pretend Play

national geographic spy science kit

2
NATIONAL GEOGRAPHIC Junior Metal Detector - Adjustable Metal Detector for Kids with 7.5" Waterproof Dual Coil, Lightweight Design Great for Treasure Hunting Beginners

national geographic junior metal detector

3
NATIONAL GEOGRAPHIC Stepping Stones for Kids – 10 Soft Durable, Encourage Toddler Balance & Gross Motor Skills, Indoor & Outdoor Toys, Balance Stones, Obstacle Course (Amazon Exclusive)

national geographic stepping stones

4
NATIONAL GEOGRAPHIC Metal Detector Accessories – Includes Sand Scoop for Metal Detecting and Metal Detector Shovel, Use as Sand Sifter for The Beach, Metal Detecting Accessories

national geographic metal detector accessories

5
National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults

national geographic rock tumbler kit – hobby edition includes rough gemstones, and 4 polishing grits, great stem science kit for geology enthusiasts, rock polisher for kids and adults

6
NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies

national geographic rock tumbler grit refill kit

Related Searches

magic kit

Activity Kits for Kids

Our Top Choice
10/10
10
national geographic spy science kit
View Deal
blue marble
Advertiser disclosure

Productpicks is a comparison website that operates independently and is supported by advertising. The products and services featured on Productpicks come from companies that provide compensation to Productpicks. As an Amazon Associate, we earn from qualifying purchases. The compensation received may influence the placement and order of the products on the website. Productpicks utilizes various proprietary criteria to determine the display and positioning of products on the site. It's important to note that Productpicks does not encompass the entirety of available product options.

About our ranking

Our editors conduct objective reviews of products by evaluating various factors such as the features available to consumers, pricing and delivery options, product comparisons within its category, and other relevant considerations. The ratings provided are based on the expert opinions of our editors and utilize advanced technology that analyzes decisions made by similar users. This enables us to offer personalized recommendations to each individual visitor on our site.

arrow icon

Back to top

icon
logo
©2025. All Rights Reserved

About Us

FAQ

Contact Us

Privacy

Terms

Contact

[email protected]