In 2012, Canadian teens Mathew Ho and Asad Muhammad, both 17-years-old, launched a helium balloon and a LEGO minifig into the upper atmosphere — approximately 80,000 feet up — equipped with four cameras to witness the experiment and a GPS for recovery. Minifig in space! Details from Phys.org:
Canadian media said the pair had fitted a box tethered to the balloon with four cameras and a cellphone enabled with a GPS (global positioning system) device to capture the journey.
They then added a nylon parachute stitched on Muhammad’s mother’s sewing machine to ensure that Lego man would return to Earth safely.
The balloon was filled with helium purchased from a party supply store.
The whole enterprise cost less than $500.
For more about the project, there’s a tv news report about Ho and Muhammad from CBC’s The National.