Can you blow a cotton ball into a water bottle?  Our scientists were put to the test.  Some students predicted that the cotton ball would fly easily into the bottle, and others predicted that they would have to blow really hard and use a lot of air.  To their surprise, no matter how hard or soft they blew, the cotton ball didn’t move at all!  They discovered that the cotton ball wouldn’t move because the bottle was full of air.  We also tried a tissue and pom pom and came up with the same results.   Ask your child to share what they learned about this experiment!