sicdaniel: My suggestion would be to remove your bouncy house (right click) and build a new one. But it's been a while since I played this game, I just bought it today, I may be wrong.
I'd like to make an addendum to your statement. To sell your rides, you must right click the
blue entrance booth. I was looking all over for any sort of sell or demolish button, and after reading your post, I was getting frustrated that right clicking the ride itself did nothing, either. Eventually I got the idea of clicking the booth and, sure enough, that worked.
[Edit: I'm not sure why I said to sell a ride. I think I read elsewhere someone saying about selling them, but I'm not so sure that's what really happens. I don't notice any money refunded when removing a ride, and the popup message actually uses the word, "delete." I'm inclined to believe that we're simply demolishing the ride when we get rid of it.]