I have one DCG and my son who are both newly five year olds, and I've noticed their social interactions with the other kids and each other changing...these two have been together since they were both two years old, and frequently say they are best friends. They've gone to preschool together and are starting Kindergarten together in the fall. They play like siblings, and fight like siblings! But, what I've noticed lately is the DCG has started teasing (calling the other kids 'babies' or 'poopy heads', similar name calling; and taking away the smaller kids special 'lovies' and tossing them so the kids have to go get them, laughing all the while. The other kids usually give an unsure laugh at first, but then cry or get upset when they realize this is going to continue on and on, or that DCG isn't trying to play. With my son its not so much the teasing, but he seems to have all this energy when playing he sometimes gets too much in the other, smaller, kids space - like he's trying to get them to play along with a pretend game and gets right up close to them stomping and being loud trying to 'ramp' them up almost. Does that make sense? Anyhow, today he followed the lead of DCG and joined in on the teasing. When teasing starts, I'm quick to stop it, reminding them that they would not like this and would be sad if someone took their special items and threw them around. They've both started being much more verbal about their opinions - 'I don't like your picture (or whatever)' and the old 'you're not my friend any more!'. Its like they have no filter! Do you all just keep working on empathy reminders with them at this age? is this typical of five year olds? Where did my sweet preschoolers go?!