We actually just bought one a few weeks ago at a garage sale, it's a Little Tikes one with a slide to get out of it, about 5-6 ft square. My kids have loved it, they are 5, 2, and 1. They can all get in there together and have a blast. What I love is it's super easy to set up and tear down. I even got it out for about 15 minutes the other day and it was worth it. You just tie the blower to the hose on the house and push a button, same for tear down, super easy. I got a great deal on it for $40, so I won't be too upset if it breaks quickly, but couldn't imagine spending the $300 on one. There are a ton of them on our Craigslist, maybe a good place to find one?