My son is 5 years old. We agreed: he goes to the toy department to choose what he likes, I go to the next department for groceries, then I'll come back and buy together. After a couple of minutes, the child ran in hysterics: two adult sellers chased him, grabbed his hands and kicked him out. When they returned, one of them began: "Did he tell you what he was doing here?" To my question "what exactly?" he offered to watch the cameras, but then abruptly changed his mind when I agreed. In general, he "messed up" - refused to talk to two strange men.
If your children are not allowed to enter without adults, explain it in words, and do not arrange a hunt for the child. The toys, of course, were bought elsewhere.
My son asked me to put you in a corner. I think that would be relevant.