It's amazing how their personalities are coming through even at such young age. DS1 loves toys and can spend a good amount of time playing by himself. DS2 is not a toy fan that much and prefers social interaction. However, the former is very talkative and the latter is quieter at same age. They are just so different. I have to adjust, as in my head, DS2 should be like DS1...a lot of undoing for me.