Hey, I just want to say something about supervision and the extra-curricular activities that happen on some dz's. My bf grew up on the dropzone with both parents jumping. He has acknowledged that while his parents were in the air, he would seek out and participate in activities that 11 year old kids probably shouldn't be exposed to, just because he was bored and the activities were accessible.
So I just wanted to relay a personal experience for those debating. I think its great for kids to see the amazing fun and energy that happens while people are skydiving....personally if I had a pre-teen/ teen, I'd keep an eye on them and things that are happening behind the scenes.