When we launched at 9.10am on that morning the critical point for the experiment was to see if the balloon would make it past 10,000m, or 30,000ft, which is the altitude that commercial airliners fly at.
We took readings as the balloon rose and mapped its progress using Google Earth and the onboard radio receiver. At over 100,000ft the balloon lost its inflation and the equipment was returned to the earth.
We travelled 10km to find the sensors and photographic card, which was still emitting its signal, even though it had been exposed to the most extreme conditions.
Eighteen-year old Gerard Marull Paretas whose science project, conducted with his pals Sergi Saballs Vila, Marta Gasull Morcillo and Jaume Puigmiquel Casamort, went really really well -- as reported in Teens capture images of space with £56 camera and balloon in the Telegraph.
Boys after my own heart -- they've posted a Flickr slideshow of the project »