Not sure if they are "real" kids. I mean they probably worked at the factory. But they do seem very young.
The undercarriage is unusual (maybe it was just on the prototype). It has been seen later on - Viggen for instance.
Anyway I think I have kept you in suspenders long enough. It did end up a killer after all.
The Turkish Aeronautical Association - Türk Hava Kurumu - produced 13 aircraft of the type THK-5. First flight 1945.
They managed to export one, a THK-5a, to Falcks Flyvetjeneste in Denmark. Falcks Flyvetjeneste was a subsidiary of Falcks Redningskorps, a private rescue and salvage company. They and a competitor, Zonens Flyvetjeneste, provided ambulance service to small islands. The service was extremely important during the war during the icy winters (with no ships) and also due to mines. The KZ-IV was developed especially for this kind of operation.
The THK-5a was bought in 1951 and flew until 1961 when it crash landed near Aalborg (
https://www.baaa-acro.com/crash/crash-turk-hava-kurumu-thk-5a-aalborg). It was not very popular because of small useful load and short range.
And the perhaps a bit confusing hints: The cap would be worn by the gentlemen from the redningstjeneste ducking in the picture.
The German night fighter ace Wolfgang Falck claimed in his autobiography "The Happy Falcon" that he was related to Falcks Redningskorps, established in 1906 by Sophus Falck.
After having subjected you to this ordeal, I'd better declare an open round