Hello there,
I have always had an interest for space(travel) and a little while ago I started making my own arduino cubesat. (a 10*10*10 cm cube)
Maybe it would be a good idea to build one in the show.
I think it should flash some LED's and send temprature, battery info and stuff like that via radio (150 km).
As it is a satellite I think the standards should be that able to survive and work at a suborbital flight.
Can't wait till the next episode,
Mark