We had a hanging thing with pockets, which went on the door next to his little table, but it was cheapo plastic and has ripped.
What do other people use? We haven't really got shelf space for this kind of thing, and even if we did, I am not sure what I would store it in. I like him being able to reach it from where he is sitting - maybe a little organiser with drawers in? We're short of space tbh. All ideas gratefully received.