I recently started dating a man who has an 8 year old son and a 12 year old daughter. I have a 10 year old daughter. We have been dating for about 6 months. We have gotten the kids together several times to play. I was concerned because the son is a little rambunctous and his kids play fight (which usually ends up in a real fight). I am somewhat strict on my daughter and would never let her "play" fight. But other than that the kids seem to get along well and they are pretty well mannered.