BALLOON POWER (Amazing Science Games and Experiments)

Materials Required:

1. 2 tea cups
2. Round balloon

Procedure:

1. Place two tea cups on a table, about 5 inches apart.
2. Place the deflated balloon between the two cups and blow air into it until the sides of the balloon are touching the sides of the tea cups. Then knot the opening of the balloon, without raising it from the table.
3. Slowly raise the balloon. You will lift the two cups.

This is what happens:

The air that you blew into the balloon pushed the rubber against the walls of the cups. The force of the air held the balloon snugly and prevented the cups from slipping away when you lifted the balloon.