Kid logic, or obvious solution?

I went into my grandson's bedroom and he had abandoned a wrapper from pop tart and a small pile of crumbs.

I pointed out the offending debris, and waited for the clean-up.

He came right over and proceded to brush the crumbs onto the carpet. As any good parent would do, I said, STOP!

He immediatley froze in mid brush.

I asked the obvious question, "who is going to pick them up off the floor?"

Without making a sound or moving any part of his body except his hand from the wrist down, he points to our dog. I hadn't noticed her sitting patiently at his side with her eyes gleaming and tail wagging.

I hesitated only for a second or two, while pondering 8 year old boy logic.

What would you have done next?