Rolling ball timer, the da vinci rolling ball timer is developed from leonardo s sketchbook concepts of an escaping mecanism. The kit uses the principles of gravity and kinetics to measure the passage of time. It employs precision gears to power a platform in a see-saw pattern that propels a rolling ball. When complete, it exhibits concept relating to the laws of motion and delivers hours of entertainment. Mærke: Italeri Forsendelsesomkostninger: 88,50 kr.
