Why does a balloon stick to the wall after you rub it on your hair?
A balloon can stick right onto the wall… with no glue at all! First we rub one on our hair, and that fills it with tiny invisible tickles. But here is a plain balloon — no tickles yet. Hold it on the wall and let go… do you think it will stick, or will it fall? Make your guess, then watch what a plain balloon does. After that we will rub one full of tickles and see how that changes everything!
After you watchWhy does a balloon stick to the wall after you rub it on your hair?
The short answer
Rubbing a balloon on your hair fills it with tiny invisible bits of electricity called charges. Those charges pull on the wall, and that gentle pull is what holds the balloon up there — no glue needed.
The whole story
How it works
When you rub a balloon on your hair, it picks up tiny invisible bits called electric charges. Hold the balloon near a wall and those charges tug on the wall, so the balloon and the wall pull toward each other. That little pull is strong enough to hold the balloon up. With no rubbing there are no extra charges, so there is nothing to pull, and the balloon just falls.
What people get wrong
The balloon does not turn sticky like glue or tape, and it does not get warm. Its outside is exactly the same. Only the invisible charges have changed — that is why a plain, un-rubbed balloon will not stick at all.
Questions kids ask
Does rubbing make the balloon sticky like glue?
No. The balloon feels exactly the same as before. Rubbing just puts invisible electric charges on it, and those charges pull on the wall to hold it up.
Why does a balloon you didn't rub just fall down?
With no rubbing, the balloon has no extra charges, so there is nothing to pull on the wall. Gravity wins and the balloon slides to the floor.
Keep going
What else makes you wonder?
- Where do the tickles go to make the balloon fall down later?
- Could a rubbed balloon stick to other things too, like a door or your sleeve?