Reminds me of my oldest brother, who drove my mother frantic because he would follow the trash truck down the alley because he was so fascinated by them. Whenever Mom heard the trash truck coming she had to make sure where he was or else he'd end up half a mile down the road if he got loose.
This would have been in the late 40's or early 50's, when trash trucks were really cool! And a little kid could count on some good Samaritan coming along to bring him home. :)
I had a neighbor boy who was like that. He was on a first name basis with the garbage collectors and this was in the 80's.