Cara, a while back someone brought up this very subject and it was discussed a bit. I know I looked across the net to find articles on rebound trampolines and found quite a lot. You might try Goggling "Rebound equipment" and just see what you get.

I do recall that in some articles it said the "fancier" you got, the more expensive, naturally, but that for basic needs, the less expensive worked just as well and served it's purpose. But of course, that was just one article.

Anyway, I think it would be fun and something different. And too, something a person could do when the weather outside wasn't cooperating for long walks...like today.
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Queen JJ
www.queenjawjaw.com
All Things Royal - 2010 and Beyond
Humorist for the NABBW