My son is 11 and this sounds very similar. We’ll get the house completely clean and like clockwork, he comes around and pulls things out that he hasn’t played with in years. I feel like when things are tidy, he doesn’t know how to process that and he thrives on chaos. He is on meds and it doesn’t really make that part of things better. I wish I had more advice other than to say that I think it’s a normal part of how an ADHD mind works.