Most people have never heard of slot cars. Especially on the 1/24th scale or the 1/32nd scale. These are just a larger version of a pretty common electronic toy like the image on the right. I got into the hobby around 1992 when my middle school shop class was, slot cars. Noteably the larger 1/32 and 1/24 scale. I fell in love and I'm still racing with my own children.
I won't bore you with the history or how these work, so if you want to know more, visit the Wiki page.