T.T.
N.,
Someone recommended Pump It Up and while its a GREAT place, it's very expensive. The room rental fee alone is $320 - and then they tax that and expect you to tip. I had my daughter's 3rd bday there and when it was all said and done, the entire party cost $700. The Frisco location (at the time) made you order pizza from Papa John's and that was a huge cost - and they tax the entire bill. Just excessive. But they do allow up to 25 kids for that price and the place is awesome. But if you are looking to not spend a fortune, this is not the place to go.
I know that the Pumpkin Patch on 121 (by Custer) normally has 2 bounce houses and fun stuff for the kids. Two years ago we took my daughter and some people were having a bday party there and they used their stuff - brought their own food/cake. I think they charge $10 per kid to get in and do all the fun stuff - that is it. Last year the owners (I think) posted on this site to let everyone know that they were going to be there again last year. You might inquire. Now, you do have to share the area/bounce house with other people - but a fun idea.
If you can not do the bounce house, you could also try the Big Orange Pumpkin Farm in Prosper/Celina (they have a website). Cute/fun place as well!
But those are only fall themed ideas.
Good luck!