Its a tough one . As a parent telling your child to fight back is very hard as they are frightened but it will keep happening unless the bully is confronted. A good slap back might stop the bully in their tracks and they will think twice about doing it again. Now it is easy for me to say that . I would probably be on the roof looking in on the playground in a frog suit waiting for the punch so I can whisk her away. It's a difficult one but you have to stand your ground. The smaller you are the dirty tactics come into play. That or play a boy older than the bully to keep an eye on your child!