The Exploratorium’s square wheels that roll smoothly are amazing! And now middle school science teacher Doug Stith has developed the concept even more. Would triangles work? Can we make the axle from a laser pen and record the movement on phosphorescent paper? What roller would work on triangular steps? Doug always has the integrity to give a shout-out to the people who started the idea, then he takes it in really interesting new directions.
Mysterious, Kinetic, Noisy, Do-It-Yourself Science Projects that Entice Scientific Investigation