I always sign cards/letters to my grand children as Grandad.
This has just shown up as a mistake and right clicking shows the alternative way. I think I am right so to spell checkers!
If they want a relaxing time, listening to stories, playing with dolls, watching childrens tv etc then yes. If they want to roll and fight on the floor, play cowboys/girls and Indians or cooking cakes etc. then they come to grandad.