What do you use? Dc is amassing a large Lego collection with more on the way but has a small room. Are the official Lego storage cubes good? We keep things in a big cardboard Lego classic box segregated into colours and put in ziplock bags but now have far too much. Why Lego don't sell sets in decent boxes that reseal I'll never know but it does my head in considering the price. He has a playmat/storage bag but I'd like to keep things more separate.