Sidamo used to be the best sharer, but under our influence he has somehow lost that skill. Maybe it's because he's not around other kids as much as he was in the care center, maybe it's because he now understands the principle of ownership, maybe it's because he's almost 2, or maybe it's because we're just a terrible influence on our little boy. Regardless, the "No! No! No! My! My!" every time another child so much as looks at one of his toys is getting a little irksome.
So, more experienced parents, what to do?