- strip of stiff cardboard
- a bottle
- a crayon
- Create a hoop by taping the two ends of the cardboard strip together.
- Balance the hoop on top of the bottle.
- Now balance the crayon on top of the hoop, exactly over the mouth of the bottle.
- Using a quick horizontal swipe, pull the hoop off the bottle. The crayon should fall straight in!
- Try it again, pulling the hoop slowly or pushing it off the bottle.
What happened to the crayon?