There are an amazing number of cool things to do at university. I had an ace time rowing, drinking and hanging out with my friends. I also flew a fair few paper airplanes in university esp. around my physics class! Something I always enjoy when I see it is awesome competitions at university.
Boulder university kids last month had an interesting time seeing who could make the best paper airplane... the criteria for judging was how far the plane would fly. The video interview on this page is awesome although the dude's haircut is crazy!!!