Air pressure - greater on inside than out.
It's called the "mouthpiece" of a balloon, where you blow air into to inflate it.
Yes you have to but here is a tip: if you want the sturdiest balloon blow it up halfway and then insert pancakes before you blow it up anymore
To inflate a balloon, you can blow air into it by using your lungs to push air out of your mouth and into the balloon. Alternatively, you can use a pump to push air into the balloon.
You are pushing more air into the balloon.
It is called a balloon pump.
you blow
you blow
When you blow into a balloon, the particles of air you exhale are compressed and forced into the balloon. This increases the air pressure inside the balloon, causing it to expand and inflate.
When the gas particles hit the walls they blow up a balloon
When the gas particles hit the walls they blow up a balloon
When the gas particles hit the walls they blow up a balloon
An older kid should be able t blow a bigger balloon because a younger kid would have less breath and would therefore blow the balloon up slower and the older kid would be able to blow the bigger one. Also, the more air in the balloon the harder it will be to blow it up.