P.K.
I find that it's sometimes hard for some dads to come up with game ideas. Perhaps you could get him a book that will give him some fun ideas of what activities he could do with his baby when the baby arrives. There are some out there that are arranged by age of the baby.
You could plant a tree or a bush in the Dads or baby's honor from his baby, then he can watch it grow and care for it as it resembles sort of bond that he can share with the baby. And, you could pick a manly type tree, like a dogwood, strong and hardy. Or, an Oak tree, which live to be hundreds of years old. I'm big on planting things in honor of someone.