visualizingmath: “ nakedgeometry: “ 9 years in the making, all our best geometry in one place. ❤, NakGeo ” It’s been a pleasure seeing so much of your cool work throughout the past couple of years, Thanks for sharing your love of.
Perpetual motion machines are cool, even if they don't run forever. This Solarbotics Perpetual Motion Marble Kit will be fun to see in action. This solar powered machine moves marbles with solar power and it won't stop unless it gets dark.