$25 to $50

Fling small objects across your room as Leonado da Vinci intended. This kit brings his sketches into reality. Everything you need to build is inc...

Have a blast with this awesome engineering project! Construct an air-powered robotic glove that launches safe foam darts. Learn about pneumatics — ...

Jumpstart your study of mechanical physics by learning all about simple machines and how they're used to make complex tasks easier to do. Through 2...

Build a series of adorable, motorized robotic animals with this introductory mechanical engineering kit for kids ages five and up. A beautifully il...

Ever dreamed of having a vending machine in your room? With this engineering kit, you can build and experiment with your own toy vending machine. F...

Build six different air-and-water powered models Harness the power of air and water to make things move! Build water-rocket cars, jet-propelled boa...

An apple that defies gravity and walks a tightrope — what would Isaac Newton have thought? Build a cute apple robot that walks along a tightrope. H...

Create, experiment & learn about STEM. Children use craft sticks and other materials to build their own catapult, craft stick explosion, Ferris...

All aboard! Put on your engineer’s cap and build your own steampunk-style train robot with amazing steam effects. You can build your TrainBot in tw...

Build six awesome bots that move without any batteries or electricity. The secret behind these fascinating machines is one of the oldest power sour...

Make a Rube Goldburg-like contraption to fling objects with abandon. This kit has everything from hydraulics to propellers. Boing! Fling! Wow! 

Wood and hydraulics combine into a robotic kit that can be built in a hour. Everything you need to build is included: Precut wood pieces, plastic...

Start-Up Circuits from MindWare are a fun way to teach your child the abstract concept of circuitry. The switch blocks and action tops are easy to ...

Build a series of adorable, motorized robotic animals with this introductory mechanical engineering kit for kids ages five and up. A beautifully il...

Think of this as an analogue robot. Wood and string combine to make a precision grabbing device. The builder controls the bot with levers and str...