Wave Machines

For ages 9 – 12
Leonardo saw the world in four dimensions. His drawings captured time. He recorded the movement of waves in water. He recorded the rhythmic swing of the pendulum that, by Galileo's time, would govern the mechanical clock. Again guided by Neil Downie's designs: construct a standing wave generator with motors and string, and construct the world's simplest working mechanical clock.

*Vacuum Bazookas, Electric Rainbow Jelly ©2001 Princeton University Press, pp127 & 33