$20 to $50

Build and rebuild these little turbo machines then bring them to life with a r-r-ripcord, no batteries needed! Hands-on learning at its best, with...

62 LEGO elements including axles, kinetics, and cranks, in this part craft/part builder set! Build 8 physics-driven bot creatures, using LEGO Techn...

It's the perfect accessory for your Magna-Tiles - a play mat that doubles as a storage bin. Now that's a unique, practical solution to playing AND ...

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...