Grandpa Name Dibs

My dad was just visiting - it’s hard to picture yourself as a grandpa visiting your grownup kid in the future.  

What will she be like as an adult?  Will I be a cool, fun grandpa?  Or a drag?  Will she have kids that you’ll be the grandpa to?  

We call my dad “Poppie.”  Is it too early to request “Big Peepaw” as my nickname?