|Balloon without a hole|
|Balloon with a hole|
We tried again, as unsuccessfully as before. Finally, we punched a hole in the bottle and tried again. This time it worked! We discussed why it worked this time, coming up with the idea that all matter, even gas, takes up space. When we blew up the balloon, we could feel the air coming out of the hole. The balloon was pushing the air out because matter cannot occupy the same space.
You should have seen all the red faces trying to blow up the balloons! It was priceless!