The school is closed today. The kids are home and they started asking to watch TV because they are bored. I remember I have a science kit I got at the RAFT in Denver. I originally plan to use this for my troop, but I thought it's a good excuse to try it before doing it in front of 20 girls.
All you need is glue gun, thumb tack, old cd, sport bottle top, balloon, index card. The instruction said to make 1 holes on the top of the sport bottle cap. I decided to skip that and use the original bottle openings instead. I glue gun the sides to make sure it's air tight and bottom of the bottle cap to the cd.
Then we blow the balloon and twist it and put the balloon on the sport bottle cap. We put a "collar" from index card around the balloon to keep it straight up. And we un twist the balloon
As the air blow out from the sports bottle cap, it slightly lifted the CD. It really moves by itself. When I took these picture, the balloon was coming towards me.
It's a good opportunity to teach about Bernoulli affect. The kids loved it, I enjoyed it. And when I told the kids it's TV time, they refused. I thought I definitely should share this in my blog...
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