To sign grandfather, take your hand with fingers outstretched. Start with your thumb on your forehead and move your hand forward in one arc, then a second arc. It is as if your hand follows one small rainbow, then a second small rainbow.
The sign for grandfather is like a double sign of father. Makes sense, because your grandpa is your father's father!
Doing the sign for grandfather will put a spring in his step. Every time you see your baby's grandfather, make the sign, so she starts to associate grandfather with the sign. We use the sign liberally to refer to any older man, rather than just biological grandparents, but you can certainly use it more strictly. There is nothing like teaching your baby the sign for grandmother and grandfather to get grandparents to be enthusiastic signers. If you want to plan something special, teach your baby the sign using a photo, and surprise their grandfather.
Stick a photo of your baby’s grandfather on the flash card to help her learn the sign. If your baby is lucky enough to have two or more grandfathers, you may want to make a couple of different sign cards or put a few pictures on the same flash card.