They follow each other around all day long. Since neither of them can talk...I have to imagine what they are thinking-
"Mom's taking your picture? So not fair. Okay...here I am..."
"Are you going to sit in that chair? Then I will too...wait...you're getting out...okay, me too."
If I want Olivia to get dressed, I just dress Isabelle. Not to be outdone, she brings me her clothes right away and sits in front of me. If I change Liv's diaper...here comes Isabelle. I've discovered that a little healthy competition can make my life easier.