We happened to be in the right place at the right time and brought home a gently used trampoline a couple of weeks ago. It was in our price range, free. Every day since setting it up, Bug and Dad have been out there bouncing. It's good exercise, great fun and time well spent together. Not to be left out, whenever Meg notices they have gone out without her, she's protesting and demanding her turn. I have been out there a few times too, and it's way better than the thighmaster.
People keep asking, "Isn't it dangerous?" Well, yes. So are a lot of other things in life. We try to be careful but things do happen. The first night we had it up Bug got matt burn on his forehead, dad hurt his back and I rolled wrong on my shoulder. We have learned how to fall better though and our skills are improving along with our saftey. We should have one of those reader boards that say "XX days without an accident on the trampoline".