J.C.
My kids just received a bouncy castle as a gift...they now sell them at Target, etc. Ours is called a Bounce 'Round. I think they cost about $150 (not sure how much a rental is?). You just plug it in and the little blower thing blows it up in about 45 seconds. I think 3 or 4 little kids can fit at a time. It comes with a storage bag too. We have had it only a month but it is so great to have when cousins come over, or for play dates, etc.