#kids #science #inventor #physics Make 50 amazing contraptions that spin fling colliding whiz. Understanding science with activities.

Paperback (1 to 2 lbs)

Rhode Island

Creating Science Contraptions That Work (& Knowing Why)

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.

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Jill Hauser

Gizmos & Gadgets

Jill Frankel Hauser

Gizmos and Gadgets