Balloon Pulls a Can
The can rolls after the balloon.
Teaching & key ideas
What you do: Charge balloon and hold it near a can on its side.
What students see: The can rolls after the balloon.
Why it works: Charges in the metal rearrange, creating attraction.
Question to ask: Why does the can follow?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why does the can follow?