DS1 has a few tactile issues: he doesn't care what his clothes/shoes look like, as long as they're comfy, and has so far been resistant to wearing a watch.
In September he will have to catch/miss buses to and from secondary school, and I think a watch is pretty much essential.
What strap do you think would be most 'comfy'? Leather, metal, or sports strap?
He loathes shopping and will just say "yeah, that's fine" to the first thing presented, but will then just not wear it. (He does that with clothes.)