Walking or Shopping

When Aunt Z got home from school today, she and her friend took Laura for a walk...to the Walmart across the street. When they got back, this conversation occurred:

Z: Let's get some Cheezits.

L: Yay!

Z: Mom, where did you put the Cheezits?

Grammy: They're gone.

Z: They are them all.

L: Then we'll have to walk back to the store!