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20 STEM Toys & Gift Sets Suitable for Tweens

tween boys playing with robot toys

Is your child showing more interest in science, technology, engineering, or math? STEM kits for tweens are the best toy gift for that child!

Engaging your child in STEM activities at home will not only set them up for success at school but also open other possibilities, such as being interested in being an engineer, scientist, or mathematician.

With STEM kits, kids gain more than just knowledge in science and math but also help them to become better problem solvers, curious, and develop a positive attitude. STEM Kits for tweens should be inspiring, fun, and educational at the same time.

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20 Best STEM sets for Tweens

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The kits on this list are inspiring and educational, and suitable for children aged 8 years and above and include everything your budding scientist needs.


NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher for Kids - Complete Rock Tumbling Kit - Geology Hobby Science Kit, Rocks and Crystals for Kids, A Great STEM Activity

If you thought all rock tumblers were noisy, then you should really try this one out! Your fossils and geology-interested tween will love this rock tumbler kit. With its sound-dampening cover, your pre-teen will watch his collected specimen reveal itself as sparkly quartz or agate.

This tumbling kit has all your tween needs to get started, including one pound of rough rocks, four bags of grit, five jewelry fastenings, a newly designed strainer, and an exclusive gem foam rock polish for a sparkly finish. It is one of the best science kits for kids.

Mega Crystal Growing Lab

These are the best STEM activities for Science Enthusiasts kids. The Mega Crystal Growing Lab gives the opportunity for pre-teens to grow crystals in 6 different colors (red, green, blue, purple, yellow and glow in the dark!).

This kit is the best way to inspire your child with a love of science and start a beautiful rock collection. With easy-to-follow instructions and two silicone growing chambers, your kids will love growing the crystals and displaying them.

This fun kids’ STEM activity that includes four real gemstone specimens, rose quartz, fluorite, blue calcite, and quartz geode which can help inspire a lifelong love of science and learning.

Nintendo LABO

Nintendo Labo, a new line of interactive play designed to inspire creative minds as well as provide a new way of play. The Nintendo Labo kits provide the tools and technology to make fun, as it shapes ideas into reality.

It has a way of teaching principles of engineering, physics, and basic programming. By assembling sheets of cardboard into a variety of shapes called Toy-Con, and combining them with Nintendo Switch, you can bring them to life!

With the Variety Kit, you can create many different Toy-Con, including Toy-Con RC Car, Toy-Con Fishing Rod, Toy-Con House, Toy-Con Motorbike, and Toy-Con Piano.

Nintendo Labo allows your tween to invent a new way of playing with each Toy-Con creation.

Mindstorms LEGO

In this set from Lego, your tween will gain STEM essential skills such as coding. They will play with robots and intelligent toys that play ball, drive, shoot missiles, and more that are remotely controlled.

It has approximately 1,000 pieces, encompassing an intelligent Hub, 4 Medium Motors, Color, and Distance Sensor with a break-out interface. Preteens can build their robotic toys and post online.

The components within the set cab work well with also the LEGO BOOST Creative Toolbox, Droid Commander (75253), and many others. It is one of the best engineering toys for kids. 

LEGO Chain Reactions

LEGO Chain Reactions kit allows kids to design and build machines that move using bricks.

There are extraordinary chains of reaction created by this kit and kids will not only have a blast but will also learn the physics behind the concepts and put it to use as they master their own inventions. It includes instructions for ten modules, six plastic balls, paper ramps, and an 80-page instructional book.

National Geographic Mega Fossil Dig Kit

A Fossil kit is a way of introducing scientific concepts to a pre-teen, especially if the kid is a hands-on learner. The kit is packed with fossils that need to be unearthed. It is a good way of having fun while spending the afternoon exploring dinosaur bones.

The Mega Fossil Mine Dig Kit sparks an interest in earth science. It allows tweens to have a taste of being a paleontologist.

The kit contains 15 genuine fossils that your tween will love digging up with the included tools of trade that are a brush, magnifying grass, and chisel.

Gravity Maze

It’s a gravity-powered logic maze game that creates reasoning skills and visual perception.

It has 60 challenges to test your tween’s skills, expanding thinking capacity and skills to counter challenges. Children will be inspired to play as they interact and test their solutions.

It is an educational toy for tweens that contains 60 challenges from beginner to expert, a game grid, nine towers, six target pieces, and three marbles.

Marble Run

The marble run is one of the toy sets that has been around for countless years and it’s still a favorite today. The toy entertains the kids and also expands their developmental and educational skills.

As they play, your pre-teen is able to acquire and develop skills such as planning, spatial reasoning, critical thinking, problem-solving, hand-eye coordination, logical reasoning, and motor skills.

It is an excellent STEM toy for tweens that has five sturdy bases, 45 clear, smooth-run track pieces, 15 exciting action pieces, and six different colors that glow in the dark.

Chemistry Model Kit

It is good to first note that all materials used are non-toxic and Eco friendly. The Model is designed to ease the study of chemistry while captivating your tween’s interest. It makes the study of chemicals, molecules, or atomic structures fun in 3D visual learning.

Since it requires a parent to demonstrate to the kid how to build 3D molecules, it creates a bond and enables parent and child to interact which is very essential for child development. It has an eight-page instructional guide and a molecule stencil for drawing structures on paper.

Snap Circuits STEM Kit

With this hands-on kit, students can learn about the relationship between electricity and magnetism and how switches operate to control the lights in their homes.

Snap Circuits enable kids to assemble electronic circuits on rows and columns grid. They function like a printed circuit board with each component having a distinct function and identified easily by color.

With this kit that requires no soldering as it is a snap, your tween will get to build over 300 experiments with 60+ parts.

Microscope STEM Kit

AmScope 120X-1200X 52-pcs Kids Beginner Microscope STEM Kit with Metal Body Microscope, Plastic Slides, LED Light and Carrying Box (M30-ABS-KT2-W),White

The microscope is made of good material with reliable optics to ensure that your tweens get solutions to their problem. The microscope features a single coaxial coarse focus knob, a specimen stage with two built-in stage clips, and a nature light and/or LED illumination system. It can use either natural light or built-in LED light.

The microscope kit comes with sample slides, coverslips, plastic tweezers, a plastic scalpel, specimen vials, adjustable lenses, collecting vials, plus a sturdy hard case for easy storage and travel. This set is great for beginner scientists.

Bath Bomb Science Kit

Does your child love crafts and science? Then this innovative STEM Science Lab kit for kids is the best gift. The kit includes an illustrated learning guide to enable your tween to follow along. All the ingredients meet the safety standards and can be put in your child’s bath. It is a complete kit that has all your tween will need to create ten fizzy bath bombs.

4M Water Rocket Kit

Are your tweens soda lovers? If yes, then let us recycle the used-up bottles in a fun way. The 4M water rocket kit uses the power of water pressure to blast its rocket (the bottle) up to 90 feet in the air.

It is a great science kit for tweens who are interested in rocketry and space flight. Your tween will need a bicycle pump which is not included in the kit.


With this set, your tween will learn all about mechanical advantage, gear ratios, rotational speed, gear configurations, and more. It includes 140+ parts that your tween can use to build three unique geared models. I.e., a crank fan, an egg beater, and a car window. It is a perfect toy for your tween to learn engineering skills.

Coding Robot Kit

OKK Robot Building Toys for Boys, STEM Projects for Kids Ages 8-12, Remote & APP Controlled Engineering Learning Educational Coding DIY Building Kit Rechargeable Robot Toy Gifts for Girls (635 Pieces)

This coding robot kit will help your tween learn programming, electronics, and robotics in a simple and fun way. It features interactive software and rich tutorials for your tween to follow. It is a super cool DIY robotic toy for kids that your tween can opt to remote control as it multifunctions.

Ice Cream Making Science Kit

KiwiCo - Science of Cooking: Ice Cream, Learning Cooking Through Chemistry Project, Ages 5+

What could be more fun than using science to make sweet treats? This is a perfect STEM kit for girls as they enjoy 18+ hands-on experiments to make sorbets, popsicles, and ice cream. This kit is jam-packed with experiments that foster curiosity, a lab guide, over 13 tools, and equipment, and easy-to-follow instructions.

Smart Lab Squishy Human Body

This is STEM anatomy that twins will love. It is a fascinating tour of the human body with 21 realistic vital organs, with bones, muscles, forceps, and tweezers. It includes nine squishy organs, a 12” clear plastic human body model, a stand, 12 plastic bones and muscles, a body part organizer mat, a 24-page illustrated anatomy book, and an instruction sheet.

Scientific Explorer Disgusting Science Kit

The scientific explorer is an educational kit that helps your child understand fun facts about the body. It helps them learn how to grow friendly mold and bacteria, create a stinky intestine, slimy snot, and fake blood. This kit includes four cotton swabs, a rubber balloon, a plastic bag, gelatin, sugar, baking yeast, and more. It is an incredible toy for STEM skills.

Shape-Shifting Box

Star Cube,Vcall 2 in 1 Combo Infinity Cube Fidget Toy Magic Star Cube Smooth Surface Magic Cube Puzzle for Kids and Adults to Stress and Anxiety Relief Mini Preschool Toys

Can your tween master the shape-shifting box? This quality and unique design is the ultimate satisfying magnetic fidget toy and brain teaser. It is a great sensory stimulation puzzle and STEM toy gift that is ideal for older kids as they collect all 12 designs.

Piper Computer Kit

Piper Sensor Explorer: Add a Real Temperature Sensor, Color Sensor & Ultrasonic Range Finder to The Piper Computer Kit!

This kit will enhance your kids coding skills as they build a fully functioning computer. There are 11 challenges using Pipercode in a fun story mode. It includes all the components needed to build a functioning computer i.e. a raspberry Pi, a 7” screen, DIY speaker, and a rechargeable battery.

STEM activities for kids will give them a well-rounded understanding ensuring they become the innovative, forward thinkers of the next generation.

Found this Tween Gift Guide helpful?

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Girl Gifts 9-years-old
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Girl Gifts 11-years-old
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Boy Gifts 9-years-old
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Boy Gifts 11-years-old
Boy Gifts 12-years-old
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