Cooking and outdoor BBQ seems to be a match, but even so, even talking about hobbies can be nice. Just ask him about how it's going what bands he likes, and see if you can take him to a concert or get him an album for example. He'll enjoy the concert, you'll be there for the time spent together. Or the painting-woodworking thing someone said.
I think the trick is to approach it from an angle of "I want to participate in your hobby with you", and see what you can bring to it, and that might get him hooked on reciprocating. Trying to get him to go first with doing the same might more likely result in disinterest.
Would your insurance have covered it? Did other people also get it as soon as Trump did?