Musical instrument would be best (imo). Anything creative and productive you can do. Something fun which betters yourself. Or earns you money.
Set up an illegal cage fighting championship in the lofts above the gyms, and charge people to watch. Maybe take bets. Be an entrepreneur. Create catapults capable of launching a fully grown adult over the entire school.
Build a robot like Sir Killalot from Robot Wars and use it to take over the cafeteria. Build a life-size replica of the Eiffel Tower out of matchsticks. Spend your free time every week constructing an
elaborate sand castle with life-sized furniture, then report yourself to the council for lack of a planning permit and
watch them tear it down. Develop a drug habit, and then replace the addiction with polos. Learn to play a sport to an olympic standard, but
never show anybody else. Import large quantities of obscure tropical vegetables and attempt to sell them to friends. Start a cult. Create a vast network of online self-help schemes.
Design the perfect sandwich. Learn to dance tap or ballet, then try and use it in a club. Learn to breakdance, and then use it in a traditional performance of Swan Lake. Make a stop-motion animated cartoon using only carefully arranged pieces of
string and
spaghetti. Draw the same picture every 2 minutes until it looks identical and can be done with your eyes closed. Look for a list of things like rubbing your stomach and patting your head, and perfect them so
you will never be embarrassed. Set a world record. Create a forest on a desk for toy dinosaurs to live in out of papier mache. Learn the list of ways to employ Wal-Mart employees off by heart. Learn the complete works of Shakespeare backwards. Learn another language. Then
refuse to speak English any more. Knit yourself an entire wardrobe. Write a novel. Write poetry. Write down all of your feelings. Pour your heart and soul into your writing.
Then burn it all. Bring a soldering iron and electronic circuitry into your common room, then start stealing odd things from around the school to create your own super electronic device.
The possibilities are endless.
