Simon is a very good helper with his baby brother. For the most part, they are still playing separately but sometimes Simon is very interested in what Dylan is up to. He helps give him bottles, he brings him diapers if I ask (and sometimes even when I don't ask) and loves to bring him toys. Simon always asks "When is he going to be bigger?"
You can tell that both boys want to play with each other, they are just not sure how yet. I am certain they will be best friends.