I personally think even the pushing to a degree is a form of frustration in communication at that age. I know now when Matilda pushes or does something to another child that I consider mean or rude, I pull her aside & tell her that what she did wasn't nice and she could hurt that person's feelings and even make them have an owie. I ask her to say sorry & if she doesn't I tell her that she has to have a time out. When time out is finished (there is ALWAYS a time out with my girl) she is given the same option, say sorry or time out. She has asked for another time out twice but by the third go is willing to go say sorry.

This isn't really about the other children, but about teaching Matilda how to behave in an acceptable way & learn that biting or pushing isn't acceptable.