Ways to clean dry erase boards. You can use Febreeze to clean a dry erase board that just won't erase (because the ink is very dried on) . Spray the board and wipe, it also helps "recondition" old dry erase boards.
Milk crates zip-tied together on their sides so that a bench seat fits on top and red bins from Lowe's can slide inside them. I don't have any milk crates, though. I also don't know what "zip-tied" means. I would use different colors.