If you are fed up with your revisions, or after you have passed your exam with flying colours, why not try your artistic gifts with water colour?
I've just discovered a pretty interesting site that can come in very handy if you are beginners. Last but not least, it's in English!!!! (so your parents can't ground you for fiddling with your computer too much)
PS: Happy Easter to everyone! (don't eat too much chocolate rabbits! coz' rabbits are nice! you can eat hens, though! hens are stupid, so I don't mind...)