Cheese.

Sonja: "Mama, Haven's wearing my hat. It's called the Plum Hat."
Haven: "Mine! Mine!"
Me: "I see that! Let's get some pictures, OK?"

Me: "Smile!"
Haven: "Cheeeeeeese!"
Sonja: "Haha! Mama, Haven's saying 'cheese'."

Sonja: "Mama, Dora wants to be in the picture too, OK? She's smiling!"

Sonja: "Oh, Haven. That's not a doll. A phone can't smile."
Me: (laughing) "Haaaaaven... Look at Mama."

Haven: "Oh HO!"

Me: "Can you smile?"
Haven: "Cheeeeese."

Haven: "Dada?"
Me: "Aw. Is Dada on the phone?"

Haven: "Dada." 

Me: "OK, Ladies. Can you smile for Mama?"
Sonja: "Oh! I can, Mama! You too, Haven. Smile!"
Haven: "Mine! Mine!"
Me: (laughing) "Not 'mine', Haven; 'smile'!"

Haven: "CHEEEEEEEEEEEESE!"

Me: "Thanks, Babies. As you were."