I had one for DD's 4th birthday two years ago. It cost me $175 for an hour and half of time, plus tip. I had to pay half up front, and the other half to the performer in cash. He performed for 45 minutes, and the other 45 minutes was the face painting/balloon animals. If you have a lot of children (I had almost 30 at this party), the performer will only be able to do either face painting or balloon animals, unless you book additional time. I think the cutoff for my place was 15 kids for both activities (balloon animals and face painting). If I had paid an additional $50, I could have had the clown for an additional half hour, and he would have made cotton candy for the kids. Decided against that one.