Masu box

This device cannot show the 3D view. Follow the step pictures and text below instead.

1. 

   1. Crease both diagonals

   White side up as a diamond. Fold the left corner to the right corner and unfold, then the bottom corner to the top corner and unfold.

2. 

   2. Fold the four corners to the center

   Fold the top, bottom, left and right corners to the center point, one after another. You get a smaller coloured square.

3. 

   3. Fold the top and bottom edges to the center and unfold

   Fold the top edge down to the center line and unfold. Do the same with the bottom edge.

4. 

   4. Fold the side edges to the center and unfold

   Fold the left edge to the center line and unfold, then the right edge.

5. 

   5. Unfold the top and bottom flaps

   Unfold the top and bottom triangle flaps back out. Leave the left and right flaps folded in.

6. 

   6. Raise the side walls

   Stand the left and right parts straight up along the inner vertical creases. The folded-in flaps line the inside of the walls, and their tips stay flat on the floor.

7. 

   7. Raise the far end wall

   Lift the far flap so the end wall stands up along the horizontal crease. At the same time push the small squares at the ends of the side walls inward: they fold along their diagonals and lie flat against the inside of the new wall.

8. 

   8. Fold the flap into the box

   Fold the standing flap over the top edge of the wall into the box, covering and locking the corners. Its tip reaches the center of the floor.

9. 

   9. Turn the box around

   Turn the box half a turn so the open end is at the far side.

10. 

    10. Raise the other end wall

    As before, lift the flap to raise the wall while pushing both corners in along their diagonals.

11. 

    11. Fold the last flap in — done

    Fold the last flap over the wall into the box. When all four tips meet in the middle of the floor, your masu box is done!