Here's a partially restored photo of Dad and Grandma and Grandad. It looks like this was a professional portrait shot in a studio of some kind. I'm terrible at guessing the age of toddlers, but I think Dad can't be more than one or two years old in this photo, which would mean it was taken in 1943 or 1944.
I scanned this using Google's PhotoScan app, since my proper scanner is broken. Once I have a new scanner, I'll be able to capture a cleaner image. Still, this isn't bad for a handheld scan!