The catalogue

Five fields. 125 working models.

Pick a topic to see all 25 build-tested projects in it, each with a materials list, a step-by-step build, and a clear working principle.

Physics

Motion, energy, magnets & light. Explore working models from homopolar motor to many more.

Reactions you can watch happen. Explore working models from lemon battery array to many more.

Things that move, sense & grab. Explore working models from obstacle-avoiding robot to many more.

Models that learn from data. Explore working models from hand-drawn digit classifier to many more.

Water, air, energy & ecosystems. Explore working models from layered water filter to many more.