HELP! need ideas for rewards if i reach my goals for my midterm grades!!!?

I'm a freshman in high school, so these will be my first midterms. I have my stuidying all planned out and i made individual goals for each cl's midterm score. I want to think of small rewards(5...one for each cl) i could give myself for each cl that are awesome, not too too expensive and dont require going out and doing something because i cant drive yet! THANKS FOR ANY HELP!!!