'Sparkles the Rainbow Fairy' recently performed at my daughters 5th birthday party.
The kids absolutely LOVED her and the show which goes for an hour and 15 minutes. In this time Anna successfully entertained 12 children!!

I think you can have different elements but we had singing, jokes/magic, a parachute game and face painting etc
It was a wonderful day and I loved that I could interact with my daughter and her friends without having to fuss around with running of games/entertainment etc.

We had some food free time at the start, then 'Sparkles' which left enough time for food, a little play and the cake.
Well worth hiring and I would do it again.