I needed some kind of storage for small bolts and nuts, so I made these small boxes. You can stack them upon each other and with the acrylic material you can easily see whats inside. The parts are made of 3mm birch or acrylic and can be clicked together.

First put together the three sides and the bottom, then the fourth side and bend the bottom plate a little, press here and there to let it snap together. Make more :)