I can't wait to be a grown-up

Tonight Cassidy said to me, "I can't wait to be a grown-up". "Why is that?" "Because I'm a little girl." "Okay. But why can't you wait to be a grown-up?" "Because I'm a little girl." These arguments are so circular. "Okay, what do you think you will do that will be so fun when you grow-up?" "Umm..Teach kids how to play piano." What's not to love about that answer??