I make their favorite dessert. My daughter makes her Dad and brothers homemade cookies and my beer cheese for Xmas. We laugh because we never manage to buy a gift that they really like, but they always like the food. I always gift wrap a big jar of cashews,or caramel popcorn, and tuck in a little cash. We've also bought gift cards to a car-wash place, golf balls( good ones, golf tees and towels and last year one son asked for a big golf umbrella.