Bubble making stuff
1. Blow up your balloon.
2. Rub it on your hair, a shirt, your dog...whatever is handy. (Maybe skip the dog!)
3. Now blow some bubbles.
4. As the bubbles float, try to get the balloon over one of the bubbles. You should see the bubble get attracted to the balloon. With a little bit of practice you can get the bubble to float up and follow the balloon.
5. If the bubbles seem to not be attracted to the balloon you may need to rub the balloon on something again. If a bubble popped on the balloon you will want to wash that off. Over time the balloon will loose the static charge you gave it. Also, if your balloon gets wet or soapy it will not hold a charge.
By rubbing the balloon on your hair, you have given the balloon a negative staticcharge. The bubble is attracted to the strong charge on the balloon and so it will follow the balloon.
For more on static charge check out the static electricity lesson plans.