My DH plays with whatever my 20 month old DS likes. We have never steered him to any particular thing but ever since he was able to notice things it has always been anything with wheels. Especially construction items. Then my DS will follow his dad with whatever daily tasks he does whether it be gardening, exercising, cleaning etc. And he will follow me with whatever I am doing.
I feel that it was not taught upon him to like these things that is genuinely what he is interested in.