[sarnu]

Both for the kid and for the parents. For example, with single childs, you have to arrange play dates. If you have more than one, chances are, they play together. Another thing: with a single child, this one child has to fulfill all of the expectations of the parents. So it is quite a burden for the child. And another thing is, with more than one child you see that your education has a limited effect on the character of a child. Assuming that you treat your kids in a similar way, you can notice a big variety in character between them.