I would look for a truck that has somewhere that they can put their hand on it to push around (like a handle). Does that make sense?

My 2s like those sort of trucks the best. I think because they can get a good grip on it and then crawl around and push it. Otherwise, it's just a bunch of zooming cars flying around the room.

I have a one plastic little people school bus and a few wooden ones that get used a lot.