Birthday poems for grandpa: Wish your grandfather a happy birthday by writing a sweet poem on his birthday greeting card. Take ideas from this post to write mature, wise, cute and funny short rhymes that will make your old granddad smile. You can send a short poem as a quote in a text message or post a picture on Pinterest and Facebook. Make him proud to have such considerate and loving grandson or granddaughter like you. All these years, your grandpa has showered his undying love on your dad, mom and now his grandkids – his birthday is your chance to shower your love on him with a wish, gift and a treat.