If you're big into space exploration - the real one and not the Star Trek kind - have a go at NASA's very own papercraft satellites. They've got paper models of their most famous and historic satellites, including Cassini, Galileo, Mars 2001 Odyssey, and many more. These satellite papercrafts are part of NASA's Solar System Exploration section. Thanks to reader Scott K. for sending in the links.
NASA Satellite Papercrafts [solarsystem.nasa.gov]