Tidying a child's room

Tidying children’s room: When my older daughter turned 12, what bothered me most was that her room looked like a bomb blast in the department store. No talk helped. The younger daughter was just getting three, and I knew that at this age, the first level of self-awareness would develop. We started playing the game "Toys go home" with my younger daughter every night. Sometimes it took an entire hour, but most of the time we managed a quarter of an hour. And then one night self-awareness arrived, and the younger daughter announced that she would take the toys home herself. For the next nine years, her room was ruled by the order of Prussian army. To my sadness, it once disappeared without a trace when puberty arrived. I very much hope that after puberty, the good old habit will reappear.