LEGOs stackable modular brick storage containers

This is my own version of some L.E.G.O. brick style storage containers. They have a simple removeable lid and are stackable. I didn't like the ones with slide-out drawers, or sliding lids, or other notches because they always seemed to get stuck or I felt like you're losing space with the drawer, however, the drawback to mine are if you stack a bunch of them, you have to unstack them in order to get into them. My son says that's part of the fun, tearing them down and rebuilding just