Jill Frankel Hauser

Provides instructions for making 75 contraptions that demonstrate friction, gravity, energy, motion, and other principles of physics and explains how to think like an inventor.

Contains sixty-five activities that introduce readers to scientific exploration, including such subjects as weather, soil science, plants, color, and light.

Provides instructions for making seventy-five contraptions that demonstrate friction, gravity, energy, motion, and other principles of physics and explains how to think like an inventor.