The Sound of a Hot Wheel Car

We bought Jacob, I think a pack of like 16 or 20 hot wheel cars. He really loved these cars and we bought them for him. One day we realized that we only had five of these cars. Well, where are the others? So we bought some more because he really enjoyed these cars. Eventually we must have had about 50 hot wheel car. But again, when we would tidy up, we could only find a handful of them. We still haven't retrieved all of the Hotwheel cars, but at least Jacob has stopped posting things now.