My three year old started pre-school last year at age 2 and with that came the "take it" behavior. I see it, I want it, and I take it no matter who is playing with it. She will play tug of war with her friends over whatever it is until one of them wins. Push her way in to take a stroller from someone. If she loses the battle, she doesn't cry, fit or otherwise react, she just moves on to something else. How can I work with her to realize it isn't appropriate behavior to take toys from other people?