An enterprising group of seventh graders in the US, led by Melody Green, had a school project to study the effects of temperature and air pressure.
They decided the best way to do this would be to launch a weather balloon with four Go Pro cameras, a styrofoam container and a whole bunch of monitoring and recording equipment. Oh yeah, and a Hello Kitty doll that Melody’s father had brought her back from a trip to Japan.
The home made rocket made it just over 40km into the atmosphere into a part known as the tropopause. Check out the video below for the entire journey from take-off to landing. And just FYI, Hello Kitty ended up landing 75km from where she took off.