Do you mean he makes 'scratch built' models from wood, card, plastic etc?
That is the most difficult way of making things. Could you not get him into making up models from kits? Either plastic kits, like Airfix, but there are lots of others, and there is a varied range of subjects: cars, trucks, motor bikes, planes, ships, historical and biological figures.
There used to be film 'monsters' - Frankenstein, Dracula, The Mummy, Hunchback of Notre Dame, and I had a fantastic Witch with a cauldron, rats and bats being cut up on a butcher's block and realistic 'blood' trickling down the grain of the 'wood'! But I don't know if any of those are still available.
Airfix also did working mechanisms, that came with an electric motor: beam engine, single cylinder internal combustion engine, etc. But they are probably discontinued too.
I assume he has done Lego and Technic, or Meccano?
Or flying aircraft from balsa wood kits. Or model railway layouts.