Hobbies for teenage girl?

i don't wanna say my age because last time i checked yahoo had this thing where you have to be 18 and i don't want to have to recreate my account but im a young teenager and its summer and im super bored. i want to pick up a hobby that may help me get in shape and i don't drive and my mom is always busy so i cant really get a ride anywhere but i still would like something to do over the summer like a project or something like that, something to keep me busy and not on the computer or tv all day. thanks for Your ideas!