If you don't have a gaming console, you could go to a nearby arcade and play games there. Or play computer games if you have a computer. Same thing applies if you have a tablet, too.
Maybe you like to fiddle with your fingers, and if that's the case, try building things with them. Legos are good building blocks, and try to make something with them.
If you want to know websites, games, or anything, you could try learning how to code. There are many programs that you can do. For example, this program that I'm in is doing a coding group for girls this summer. Got to be old enough, though.
Get some recipes from your mom, your dad, or the internet, and get cooking.
For example, I love sweet stuff, so start simple or go extreme:
To be honest, I'm running out of ideas, but that only proves my point on what you could do. You just got to get up and do something. These few years are going to flash right before your eyes, so are really going to spend them doing nothing. No, you're not, beacause you are gonna get an inch out of your confort zone and try something that you may or may not like. Now go, be free and don't accidentally destroy the world while you at it. Please don't.