Here is a list of things you could do for a hobby:
1. You could collect stuff. (Rocks maybe?)
2. You could go into singing or you could learn how to play a musical instrument. (The piano is good)
3. You could go into acting.
4. You could practice juggling and get really good at it.
5. You could practice magic tricks.
6. You could practice different forms of dancing. (Break dancing is cool)
3. You could go into photography (taking lots of pictures, example: lots of different kinds of nature)
4. You could teach yourself how to draw really well or maybe try painting.
5. You could go into cooking.
6. You could go into gardening.
7. You could go into learning how to make your very own video game. (Game Maker is pretty good to start out with, Google it.)