Sharing Help Needed

you sit on the floor between them. The toys are "yours" & "you choose to share with everyone". Take the time to divvy them up between the three of you....& simply role-play (without the boys being aware) the behavior you wish for them.

It truly can be as simple as that.....you are the leader & you teach them your life rules! Socialization & cooperation are the most important life skills to be taught to this age group....makes KG all the easier!

Patience, patience, patience! Yes, it will take some time, but you just have to keep on keeping on. As others have mentioned below, give him guidance about why to share and what to do, and keep on encouraging him in that, and discouraging bad behavior. Most of all, it takes time -- it won't happen overnight -- but if you keep on, you will eventually see the fruits of your labors.

You should be talking to both of your children..but especially the 4 year old about being considerate of other people...not hurting their feelings...etc...the GOAL is that he doesn't share because you make him..he shares because he wants to be good to others.
I know...that is a lot to ask...and it isn't going to happen overnight....sometimes you will have to just step in and take charge...especially if it does become physical.
You also have to realize that at this young age everything they see or touch or even think about is "theirs"...and sometimes...especially with the younger one the secret is "distract distract distract".
I recently have my 4 year old and 2 year old grandsons here ( cousins)...and it was a continual battle...both of them wanted the same thing at the same time...and we just had to step in and try and make it as "fair" as possible.

My five year old boy ends up being quite enamored with some of the toys the 17 month old gets (for christmas, etc). I make a BIG deal of pointing out how good Dylan (17 mo old) is about sharing his toys with big brother. It helps when I need to remind Adrian to share his toys too.