https://en.wikipedia.org/wiki/Old_Enough!
Old Enough! is a Japanese reality show that has been aired irregularly since 1991 on Nippon Television. The program depicts, in a documentary manner, the efforts of toddlers going on an errand on their own, buying groceries and delivering packages, accompanied by the camera crew.
The American version - https://youtu.be/VhGTtWsW9F8