All you need is a plastic bottle and a balloon!
Insert the balloon into a clean empty plastic bottle and pull the mouth of the balloon over the mouth of the bottle.
Ask a volunteer to inflate the balloon. It’s impossible!
Another fun demonstration to add to a science unit, use for a science night, or show students just for fun. No prep time or materials? Use the videos at the end of this post to prompt a conversation about science! Depending on the age of your students this could be demonstrated by a small team of capable students. All you need is two balloons of the same size, about a meter of string, and a drinking straw. The materials are so common students will be able to repeat the activity at home. 🙂 Inflate two balloons to the same size. Tie …