Hi. I just wanted to say that I have 2 daughters who are 26 months apart. My daughters love each other and play together. I think it's partly up to the parents regarding how their children will get along and play together. As a parent, you help foster the relationship between the siblings. I wouldn't worry about 4 years being too far apart. My brother and his wife have 3 daughters. The oldest and middle are 4 years apart and are very close.