You need a balloon and two cups. Blow the balloon up a little bit. Then place the cups to the balloon and continue blowing. When the balloon is big enough, drop the cups. The cups are stuck to the balloon. While blowing the balloon up, the air inside the cup was pushed away a little bit. The air pressure outside the balloon pushes the cup to the balloon.
hi,nice experiment is very funny.
ReplyDeleteFrom Esclavas school,Spain.By Fran