Model railways, the world's finest hobby. Even in the 60s Hornby-Dublo were producing excellent models and back in those sexist days almost all boys were lucky enough to have a set or a loco or two. Hornby still exists of course and if anything model railways are more popular than ever. They captured all the promise and excitement of a technological and mobile society. And now of course, as the roads die through lack of fuel, railways are the future.
And of course railway modelling needs so many skills, from electrics, carpentry, electronics, scenery etc etc