Strategy games,40k,MTG,anything to do with computer's and just thinking outside the box usually by making and breaking theories (constructively of course) but most importantly just getting people to like them-self or feel a little less sh*t
My S1 teacher done that with 2p coins and him (allong with some friends) made them look like 10p coins and they were actually being looked for by the police and they've not found out,