This has brought back a flood of memories - as a single mother in SA in the 1950s, my own mother would leave the 3 of us, in our "Sunday best" lined up outside the department store where she would go in to do her shopping. We would always have a "treat", a lolly or similar, and we never felt afraid, or threatened in any way. I have no idea how long we would be there, but I do remember sometimes sitting down against the window. We were not on the street, the department stores had display cases and windows that led to the off-street entrance. Our ages would have been 5, 6 and 7. We would never have dreamt of causing my mother any problems, we understood that we had to behave, and we did.
We were "latchkey kids" - going home alone after school from the age of about 12. Before that, we would be taken, in the "school taxi" to my gran's house every afternoon. By the way, the "school taxi driver" was later charged and found guilty of molesting children. He never tried anything with us, perhaps because there were 3 of us.
As a further aside, from about 10 years of age I would be sent to the grocer shop with a list, money - and a budget! Very good training.
It was also my job to clean the lounge on Saturday mornings. I loved it because my mother would give me carte blanche with how things were displayed, so I often had my brother help me and we'd rearrange all the furniture
Perhaps because of my own experiences, I left my own children unsupervised at times as young teenagers (never overnight). They were pretty responsible so I never fretted about them. However the arm (frame) of our sofa was mysteriously broken, and years later, my daughter confessed they had been doing somersaults on to the couch when it happened. My son was a strapping teenager.