Dad and Grandpa went together to chop down the Christmas tree every year.
I call my dad's father Grandpa, but I call my mom's father Grandad.
Create a special handmade gift for grandpa and grandma by painting a plain wooden picture frame so they have a fun place to display the newest photo of your little one.
This will generally be low-cost and, in addition to art instruction, will offer priceless time spent with the Grandma and Grandpa generation.
For example, if your family portrait features mom, dad, grandma, grandpa, and a new baby, then you might consider having the infant wear a bright colored outfit while the rest of the group wears muted tones.