DS2 (4.1) will now sometimes take an engaged verbal role in non-physical play with peers but if it is unstructured (eg two boys with trains on the same train track) he can be controlling. He doesn't hit but will try to persuade the other child to do it his way by issuing commands. Often he can "see" patterns on the track that the other child can't; also he finds the idea of the trains actually crashing unpredictably into each other distressing.
He never hits but he screeches and cries until the other child gives up/gives way/does it DS2's way/wanders off.
His brother now knows to ignore the screeching until DS2 sees that DS1 has come up with a better configuration/game, etc whereupon he calms down, but I can't expect this of other children. We had an embarrassing playdate a few months ago and I've only just redeemed DS2's reputation with that mum (by going to softplay, where DS2 is a brilliant playmate - no possessions there, you see, and they all want to play it in the same way).
There is good stuff on this in Greenspan and in Talkability but I don't know how far from the norm he is/how much he just needs experience and practice/how much "floortime" I need to put in - all those sorts of things.
Anyone else working on flexibility? Any thoughts on how far behind he is?
It's quite painful challenging him on this - horrible to make your child cry - and I'm seeking a buddy I suppose!