This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Two packing boxes hinged as shown and fitted with casters make a very convenient portable closet. It can be folded flat against a wall or fitted into a corner. If furnished with shelves, it can be used as a bookcase or tool closet, and when fully opened, it makes a handy workbench.
Two projecting strips are fitted on the inside of one box so as to fit tightly against the inner top and bottom surfaces of the other box, to increase the rigidity of the box when closed. The addition of casters makes the opening, closing and pushing about very easy. An ornamental hasp or lock can be fitted if desired.
Ill: The Two Boxes are Joined on One Edge with Hinges and with a Hasp, if Desired, on the Other