Olivia (1-year-old): Mama! Mama!
Me: Hi, Olivia. I'm back.
Olivia: I wan milk!
Me: Olivia, do you want milk?
Olivia: Yea, yea, yea (while bouncing up and down and smiling)
Me: Alessia, throw out Olivia's diaper for me.
Alessia (2.5-year-old): (determined silence)
Me: Alessia, are you going to throw out Olivia's diaper? Are you going to be my big helper today?
Alessia: (determined, deliberate silence)
Me: Alright, I'm going to do it.
Alessia: I'M GOING TO DO IT. (Runs to snatch diaper from my hand.)