A wonderful picture. Yes, I'd say frame it. My four little granddaughters are all grown women now but I cherish the memories from when they were actually Little! It is still very special on the rare times when they come to visit.
I spent nearly 3 hours Friday morning doing the same with the 8 month old boy of a young couple at our Church. Momma was at work and Pappa had to go to a doctor's appointment. They don't have a lot of money so a paid sitter this time of year was an expense they didn't need. I have most Fridays off work anyway, so I got to play grandpa for a little while. We had a great time, win-win for everybody!