Drew and Grayson becoming playmates

I have been looking forward to the day when my boys would play together and it is starting to happen. They enjoy rough housing, baseball, hide and seek, etc. They are, of course, learning how to share, which is a challenge for them and me. Grayson has an especially difficult time, but is starting to understand that he has to take turns. Grayson loves to copy whatever Drew does. Drew likes to Grayson "Dewy", which he made up. Drew is constantly living in the pretend world. He has an extensive imagination and he enjoys making up words. I have caught him talking to himself, which I find quite funny.