I was really surprised to learn a few years ago where the hobby of model car building stands today.
Check out these videos...
“Tips and Tricks for Building Show Quality Model Cars with Donn Yost”
https://www.youtube.com/watch?v=iX-RhJiNopk
Custom model cars car show
https://www.youtube.com/watch?v=-3UM7u2iNSk
All my model cars 2016
https://www.youtube.com/watch?v=58_btMd9n30
Lots more here...
https://www.youtube.com/results?search_query=model+cars
But I don’t personally know of any kids that are doing this (or real similar activities), although we have 5 grandkids in the house who introduce many of their friends.