Hi dear.
Well, I guess if he enjoyed shooting, how about going to a paint-ball shootout, that might be fun.
You can also ask him if there is something that he might like to try out, even though it seems boring to you, for him, you can go along with it for a while.
How about going to dancing class together?
It depends on what other interests in life he has.. and what your interests are.
So, as I've stated before, it will take some talking and testing. Just because you belong to the younger generation' it does not mean that you cannot learn 'old' things together like cooking, painting, other hobbies - just talk to him about it and it does not need to cost much.
How about a weekend camping trip somewhere, or wine-tasting or to an amusement park?
Anything is worth a try if you are bored at home.
Have a good weekend!