I agree, and watching larger families in my community (where my three kids is a "small" family), it's obvious that older siblings take a significant role in hel

I agree, and watching larger families in my community (where my three kids is a "small" family), it's obvious that older siblings take a significant role in helping the younger. That said, the demeanor of kids matters a lot, as my oldest (teenager) is significantly more of a challenge than my other two. She by herself takes more energy than the other two combined.