Since this is a fund raiser, personal pictures are allowed only at the same time you are taking the picture. If they want to use their camera alone, the price is the same. Don'd do balloons if the circus people are selling novelties. If we do it badly, we mock them. This is important as the producer may have to adjust the length of his show.
Suitable music adds a lot.
Have it prepared and give it to the person responsible well in advance so it can be cued up. Don't sit on or touch any other performers props. Be aware of the acts immediately before and after you. Be ready 2 acts before you are to go on. If there are speaking parts then you will have to consider mikes, etc. 7.