(CAUTION: Always ask your elder to help you carry out the experiment.)
REMOTE CONTROL ROLLER
What you need:
Empty soda can, Blown-up ballon, Your hair
What to do:
| 1 |
Hold it with your fingers until it stays still. |
| 2 |
Rub the ballon back and forth on your hair really fast. |
| 3 |
Hold the ballon about an inch in front of the can. The can will start to roll, even though you're not touching it. |
| 4 |
Move the ballon away from the can - slowly - and the can will follow the ballon. |
| 5 |
If you move the ballon to the other side of the can, the can will roll in the other direction. |
| 6 | Hmm..How fast will the can roll? How far can you roll it before the cans stop? Will it roll uphill? Do some experiement to get the answer. |
| 7 | If you have some friends with cans and ballons, you can have a race across the room or down the sidewalk. |
DO YOU KNOW WHY THE CAN MOVES ITSELF?
Put the can on its side on the table or the floor - any place that's flat & smooth. 
