I'm on summer Vacation and don't know what to do.. Help?

It's been summer for a week already... And of course like every 'tween' (I'm 13) I'm bored. Most of my friends are either on vacations or out with their moms or something. Both of my parents are at work during the day, and my mom doesn't come home till 3:30pm. What could I do? I live in North Carolina and I have a pool and trampoline in my backyard. Those do get boring after awhile... Any suggestions??? Thanks in advanced. :)