MATERIALS NEEDED: ping pong ball glass of warm water small plate

STEPS TO FOLLOW:

With your finger, push a small dent into the ping pong ball. Place the ball into the glass of warm water. Use the plate to hold the ball down.

Observe. (After a few minutes, the dent will be pushed out.)

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Last modified: Tue Mar 24 17:44:00 PST 1998

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