Some things spring back!

Pull a rubber band and it snaps home. Squish clay and it just stays. Why?

2

Inside rubber hide tiny curly springs. Inside clay are loose little balls.

rubber = springs clay = loose balls
3

Pull the springs and they stretch open… but they want to curl back!

4

Tap to pull the rubber band — feel the springs stretch!

Tap the band — watch the springs open wide.

5

We pull this band SUPER wide — wider than ever! Will it still SNAP BACK, or did we stretch it too far so it STAYS?

Tap your guess!