Picking up

Nancy: "Where did mommy go?"
Ian: "They go to pick up Emmi"
Nancy: "Give me a sentence"
Ian: "Mommy pick up Emmi"
Nancy corrected
Ian: "Mommy went to pick up Emmi"

Ownership

Looking out the window at something:

Ian: "That's mine"
Nancy: "Ian, what is yours?"
Ian: "That one"
Nancy: "Oh! That one is yours?"
Ian: "Yes. That one is yours"
(Nancy corrected)
Ian: "That one is mine"