How 'bout....
Party charactors 4 you
Fantasy Party Planners (at least that implies it's not just your average birthday party)
Hubby used to do this type of gig w/ a friend of ours. Her business name was Party Animals, but her ads also stated they provided charactors for parties. They also did Christmas parties and provided Santa etc. This gal actually did one child's party that had the entire cast from the Wizard of Oz.
Good luck. You should do well, many people will spend, spend, spend for their child's birthday party. The one I mentioned above....the Oz group wasn't the only entertainment, they had a full size carosel, moon walks, ponies, hayrides....the whole nine yards. Friend said she knew these people spent 5,000 bucks on that party alone. Btw....the kid was 4