Place the 2-inch edge of one cedar sheet against the face of another to form a right angle. The two sheets should form an L-shape.
Attach the two boards with 4-inch nails. Hammer in one nail every 4 inches along the joint of the two boards; place the nails through the face of one board and into the 2-inch edge of the other.
Place a third board at the other side of the right angle to form a U-shape. Make sure both 2-inch edges of the cedar sheets are placed on the face of the third board so that the wood box will be even.
Attach the boards with 4-inch nails. Put the nails through the face of one board into the 2-inch edge of the other. Hammer in one nail every 4 inches.
Add a fourth board to the U-shaped structure to close it off. Place the board so that its face lines up with the 2-inch edges of the other boards. Attach the fourth board with 4-inch nails.
Place a fifth board on one of the open spaces to create a bottom for the wood box. Line up the edges of the board with the 2-inch edges of the box structure. Attach the board with 4-inch nails. Hammer in one nail every 4 inches along all four sides of the box.
Attach two hinges at the open portion of the box. Place the hinges on one side of the box and attach them with 2-inch wood screws.
Place the remaining cedar sheet along the hinges and attach the two-inch edge of the wood to the hinges. Use 2-inch wood screws to attach the cedar box lid to the box.