I am currently making a Tubber Sat which is a lunchbox with a small experiment on board, which will be launched in a weather balloon 🙂 The experiment on board is to look at carbon dioxide concentrations between the height of 18km to 38km altitude. 🙂
The most interesting thing I made which is currently in space is a steam-kettle based propulsion system. It’s on several satellites orbiting the Earth and giving them the thrust they need to change and maintain their orbit so they can take wonderful images of our planet. More interesting than that is the asteroid mining satellite we’re working on here, though it’s not in space yet. Soon it will be hopefully!