[Cardboard Ninja] goes about the build quite smartly, cutting the legs from the four long bends already in the cardboard. This is repeated in the shelves, which are made from the box’s sides ...
So they took matters into their own hands, building a bioactive vivarium for their pet! [leftthegan] found an IKEA Kallax 4×4 shelving unit for a fair price, and after a few design iterations ...