What to do during the summer if you're bored?

So I'm bored and I have like 2 more months of vacation and there is NOTHING to do! I'm 13 (almost 14) and I live in Honolulu, HI. Please give me a list of things that don't including leaving my house (or at least my neighborhood) because my parents are working and I can't leave my neighborhood (even though my neighborhood is really boring, there's a crappy park and a bunch of old people). Also, please don't suggest things to do with friends or other people because I'm like a loner and I don't hang out with people. Also, please don't suggest buying or shopping because I'm broke lol .I know that kinda narrows down my choices but I'm soooooo booorreedd. (Also, don't say watch TV, read, or go on the computer, because I do that EVERY DAY!)