Social Skills Of A 4 year old

As my son grows I studied about his development. I tried to search some his behaviors specially dealing with other kids. I noticed he is a little bit bossy and demanding to other kids. I tried to correct it and good thing he will listen to mommy. We have a good time together everyday specially we always went to the park playing with the kids. Anyway, here are some information of his social skills:

Your child interacts regularly with friends and acquaintances. She may even have chosen a "best friend." Usually -- but not always -- the chosen child will be of the same sex. Your child's peers will begin to have a real influence on her behavior. If, for example, her new friend has possessions or privileges she doesn't -- like, say, cool sneakers, or more TV time -- don't be surprised if your 4-year-old starts demanding the same. Most of the time, your preschooler can be counted on to share and take turns. She understands simple rules and, when playing in a group setting, usually obeys them. Make-believe play grows more sophisticated. Instead of just acting out "house," your 4-year-old may opt to play "fire station," "candy store" or "circus." When playing in a group situation, one child usually emerges as the leader. She will assign roles to the rest of the kids -- usually saving the best parts for faithful followers.

Source: Ivillage Prenting