I'm sure these photos are funniest to me because I know these kids so well. I see Ava posing with her princess smile, and Wyatt and Charlotte with about the same expression on their faces. That is, 'I am not at all impressed by these proceedings.'
And then after I try to get the little two to smile, I get this. Ava: princess smile; Wyatt: CHUEEEEEESSSSSEEEE!; Charlotte: huh? wha??
And here we have the classic "I have two sisters and enjoy the occasional sparkly outfit" pose.