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How cool is it that the mainspring stores energy, then converts it to motion? Discover the physics of potential and kinetic energy and the inner wo...

Plus-Plus is perfect for small hands and big ideas. Guided by the instructions included, you can build a Tiger ready to move in the Savannah with t...

If your tween or teen has a fascination with all things steampunk - or trains in general - then this kit is for them! Young engineers put on their ...

Experience mesmerizing magic in slow-mo with the Trestle Tracks Builder Set! Each set features hollow stacking cubes and perfectly flat tracks with...

Stack hollow cubes to magically propel stainless steel marbles down a track for a truly mesmerizing experience! Eighteen special tracks grow wider ...

This single wheel is built in skeleton steampunk style, which means you can see and enjoy the beauty of moving gears. Despite its airy and delicate...

How can one interlocking shape unleash such wild imagination? Build this unicorn in any direction, from flat to 3D. The 70 pliable, puzzle-like pie...