Pre-College Summer programs

<p>I'm considering doing it right now, and I was wondering if someone could tell me what it's like. I know absolutely nothing about it, so what do you do? How structured is it? When do you need to start applying by? How hard is it to get in? Are they fun, or mostly work? Just tell me what you know! Also, how much do they help with colleges? I'm not doing it just to look good, I would do it regardless if they sound fun/ interesting, but yeah, how does it look? thanks!</p>