That's really cute and nice of you both to make the effort and try to find common activities ! Something like this that worked with my much younger brother was cooking desserts. He's not a very talented cook, and very rarely tries a recipe on his own, but whenever I tell him in advance that I wanna do a brownie or a crumble, etc... with him, he gets really excited and we end up having great results (even though he does maybe 10% of the work lol)