Inner Child Fun devised a simple way to make cardboard panels cut from a large box into a modular building system. By making a few evenly spaced slits in each panel, they can be made to lock together in just about any direction.
The big advantage to this method is how small it all packs up. As opposed to trying to store a huge refrigerator box space ship, these panels can be bundled together and stored under a bed or in the back of a closet. Nicely done, Valerie! • See more: Inner Child Fun MORE FUN WITH CARDBOARD FROM APARTMENT THERAPY: • Cardboard Box Crafting Inspiration • A $4 Cardboard Princess Castle • Crafting with Cardboard: Build a Box House (Images: Inner Child Fun)