Laughter is the best medicine

It's not often that all my children are laughing together - mainly b/c Seth is still selective with what will make him laugh. Up until now, it's mostly been me that been able to get him to laugh. Matt could sometimes, but for now anyway, Seth is a momma's boy.

We were on our way home from the pool today and Luke was being silly and he figured out what gets Seth to laugh, a lot! This is the most Seth has ever laughed at once.

What is it about a baby's laugh that can put everyone in a good mood?