Who Knows Pedal Cars?

Spent the day with my sister and her family grillin out hamburgers. My brother in law showed me this cool pedal car his sister gave him she had been keeping all these years. It was his growing up. I think it's really cool. Do any of yall know anything about it? It says "Hot Rod" on the side and 5 on the front and back with some cool lookin headers on the sides. It's also chain drive. The tires show very little wear. No rust through anywhere, just surface rust. He was talking about cleanin it up and gettin the rust off, but I told him no, to leave it alone. I think I got through.