The most impressive science project I've ever seen
In sixth grade I built an air-powered car for my science fair project. I used a hammer and nail to puncture an air-gun cartridge that I had connected to a car I made from some building blocks. I used it to show how jet propulsion worked. It was pretty cool, if I do say so myself.
These Spanish students put me to shame. They constructed a balloon that went to the edge of space. It took atmospheric readings and sent back pictures. From the edge of space. These are Spanish high school students.
There is a story here. And a set of Flickr pictures are here, but here is a sample.