Mystery Photographs

This photograph was found in a box of family artefacts; it has at some time been framed which would seem to indicate that the children were family members or at least well known to my grandparents. There is no clue as to who the children are but it would appear from the clothing that the 1920s period is a likely contender. There is a possibility that the children are part of the Simmonds family but I can't make the ages of the three (if they are siblings) fit in with any branch of the family tree.

I am also intrigued by the location, is it in or near Bridgend? Possible contenders are;

Parc Brook which wends it way from Cefn Glas down to Newbridge Fields passing under a few stone bridges en-route to the River Ogmore.

Morfa Brook, now mostly culvetted under Bridgend Town Centre.

Or do you have any other suggestion?