Run Monkeys Run Game
Get all the kids to line up against a wall or a fence (preferably outside) have the birthday child step far back with a ball in his/her hand and have her yell "run monkeys run", then the kids run and she/he throws the ball at the kids. If she/he hits one of them they are out; then continue doing that. (It's similar to dodge ball. It's best to use a soft ball that won't hurt anyone).
