i've pretty much done the same thing as everyone else has said... the big heavy duty plastic bins seem to work the best, and i definitely use the lids to make them more stackable (better use of space). i've also used those big 3 drawer systems that rubbermaid makes for legos because our legos have most definitely outgrown one little bin. we are planning to redo the legos even further and sorting them back into individual kits (which sounds like a nightmare, so i'm putting it off) and then putting each kit in a smaller bin. yes that will be a lot of bins, but i think it will be worth it in the end to have them accessable and manageable once again. the legos in this house have gotten out of control!