Maybe one day I will have a playroom for the kids and this will definitely be going on the wall... love it!
Charlie’s room is all about toys and access. I bought that another amazing IKEA Expedit bookshelf (a modern classic, if you ask me) and some nice looking baskets and that is how he manages to play in there and tidy his room almost all by himself at the end of each day.
I would put these at the bottom of our stairs, on for each child, to put toys and what nots that belong upstairs. They empty out every time they walk up or more realistically when we go up to bed at the days end. Main living area stays clean and each child is responsible for their own stuff.