What would you get a son in law you can't stand for Christmas?

I adore my daughter and she gets me nice gifts . I usually get her husband, who I don’t like for good reasons, gifts. She admits he laughs at most of them because he makes so much money I could or would not choose to impress him plus I don’t like him so I would not spend much. He doesn’t like his parents either. But my grandkids adore the man and he works like a dog to give them anything theyd ever want. I love my grandkids so I hate to stiff their dad. What should I do?