Thank you PaulE and pilot4fn
He is great though initially there was a lot of protesting and to be fair to him he is not able to do as much as he would like as he hasn't got the strength yet to lift the parts, unbolt, etc and spent a lot of time after I taught him what I was doing and why, watching me struggling to get a rusted part off
Fortnite will always be more appealing during those times
As the car will be his when he is old enough I made a point that he needs to know how it works and how to maintain it.
I was stripping car engines, gearboxes with my father from about the same age as my son and when I was 17 i worked non stop to save up and I bought a 2.0s Capri which I resprayed, added a double x pack body kit and lowered it to an inch off the floor and also rebuilt its engine. I haven't stopped since and hopefully he will have some interest and experience to maintain his own cars