How to Build Foldable Chairs

Cut the oak plank into two, 30-inch long pieces. These pieces slot together to form the chair.

Cut a paper plate in half. Place the paper plate on one end of one of the plank pieces with the rounded part against the end of the board. Trace the outline of the plate on the wood with a carpenter's pencil. Repeat on one end of the other plank piece. The ends with the plate outline are the top. The ends without the outline are the bottoms.

Locate a spot on one of the planks, 12 inches from its bottom. Draw two lines across the plank, 12 inches from its bottom, spaced 1 inch apart. Repeat on the second plank.

Connect the two lines on one of the planks in the center of the plank with a carpenter's pencil. Repeat on the second line. Erase the portion of the lines after the line that connects them on both planks. These three lines form an outline for the slots on the chair. The slots will measure 5-inches long, by 1-inch wide.

Cut out the slots following the lines carefully with a jigsaw. Cut the outline from the paper plate on the tops of the planks out to make the ends rounded.

Cut the bottoms of the planks on a 60-degree angle. This will allow the chair to sit flat on a level surface.

Smooth both pieces with 120-grit sandpaper. Pay close attention to the areas where you made cuts, removing splinters and rough spots.

Apply an even coat of wood stain to the entire chair using a paintbrush. Allow the stain to dry. Apply more coats until you reach the desired color.

Slide the two slots together. The two angled ends will rest on the ground for the legs, while the rounded ends serve as a seat and back. This is the completed chair.