How many cups can you stick on your balloon at once?
Here's how kids have voted so far:
22% 1 cup
25% 2 cups
44% more than 4 cups!
How's it work?
When you hold the cup to the balloon and then inflate the balloon further, the air pressure inside the cup actually decreases a bit. This means the air in the room presses the cup tightly against the balloon, holding it in place.
Want to talk about it? Go to the boards and discuss your results with other DFTVer's!
I used a bunch of little cups and a huge balloon, and got 8 cups to stick at once.