No matter where they are in the world, your grandparents are always close in your heart. Remind them on National Grandparents Day, Sunday, September 13th, with this thoughtful card. Showing a girl Facetiming with her grandma and grandpa (which is very timely today), it's proof that only miles can separate us when it comes to the unconditional love they show us each day. And even if you don't see them often, the impression they leave with their words and actions means everything.