I have a photo of my husband's grandmother walking up the main street of town. It was taken by a street photographer in the town she lived in (Scotland). I also have one of my father in law and a friend walking in town, both would have been taken in the late 40's, early 50's I think. Your photo reminds me of the ones in my possession.
I remember as late as the 80's there were still photographers on the street taking photos, this time you or your child could pose with a monkey which had a harness/strap on.
Maybe your photo was taken in a similar situation. Or...maybe my town is/was weird..

Jules
Edited to add: I've just remembered another photo where my husband was taken to the seaside by his grandmother and as they came off the ferry a photographer snapped a picture of them.