It's nothing fancy - just the Rationell Variera Cutlery tray. It works perfect for storing desk stuff. And at $1.99 - by far the cheapest desk storage system out there. Maybe because it's not marketed as a desk storage system. If you go to Staples (which I typically love) - all of their storage solutions cost an arm and a leg.
So now all his art and homework supplies are neatly organized. And on the cheap.