how to teach my DS HOW to play w/ other kids?

[huango]

Is it the age or is it that my 3.5years old DS doesn't know HOW to play?
DS is very active and sometimes aggressive.

examples:
- we went to an indoor plaything and there was this ~8year old boy who DS chased all over the place. they both were laughing and DS made really loud monster sounds until he almost lost his voice. But when DS chases/monster-sound kids his age, they cry or run off scared.
- he is easily worked-up: when he makes monster sounds and starts to jab in the air with his arms, I'm fearful that he may make contact accidentally and hit another kid, so i stop him. constantly i say 'do not touch anyone'.
- at preschool, he just chases after kids and tries to 'vacuum' them w/ his pretend vacuum/hose. the kids ran away from him; teacher asked him to stop (which he did).
- he wrestles and 'traps' his younger sister who cries big tears

Do kids his age know how to make friends?
he only goes to preschool 1 morning a week. he does see other kids his age, via my friends' children or the neighbors, a couple time a month.

is he just playing it the way boys play?
or do i just have him play with older boys (who usually do not want to play with 'babies'.)?

i'm so tired of being the mother of the 'kid on RedBull'.
I can't keep up with him.

thanks for your input.

[Kingdono]

I just was at a seminar by my son's doctor. You should use lots of positive feedback.

Like Jimmy you did such a great job of playing with the girls today. They really liked that you used a nice voice.

I too have a full of energy child who likes to enforce the rules. It will take a lot of time but it will change how he acts.

If it's possible maybe another day or two in school or a normal play time at the local playgorund or play place and encorage him to try and play with kids his age.