It does matter actually. I have two little cousins. One is 4 and the other one has just turned 1. Most of us cousins pay more attention to the little one and spend more time playing with her than the 4 year old and from what we’ve been told, it has affected her. Therefore, we now try to balance it out even though the 4 year old is quite a brat, which is part of the reason why we often tend to ignore her.