My daughter asked why I always make her wait in the car while I 'just grab one thing' at the grocery store

I told her it's called strategic shopping.

I go in with a list of one item and come out with everything we forgot we needed—plus snacks I didn't know existed. The car wait is so she doesn't witness my cart filling up in real time.

Punchline

Besides, if she came in, she'd ask for things… and then I'd need two carts.