Graphs were one of my favourite things in school. Them and lunch. Some people are still having fun with them, in fact there is a whole site dedicated to fun with graphs, its called graph-jam. If the name isn't hip and urban enough for you, wait till you see some of the whacky stuff on there! This is one of my faves right now, it shoud give you a little taster of the madcap stuff people come up with... mad I tell you.