I saw this video a while ago, but I still think it's cool. A father and son attached an iPhone to a weather balloon and released it with the video rolling. Once it descended, they located it with the GPS in the iPhone. Awesome. We are learning about gravity this week, and so it came to mind. Enjoy!
There is a group of physics professors at Henderson that do this. Maybe you and the kids can do a field trip with them!
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