Follow my 7 easy steps to get a useful box.
Step 1. First of all you'll need a rectangle of stiff paper about 20 x 15cm.
Step.2. Then you fold the paper from bottom to top and from side to side.
Step.3. Then fold both the long edges into the middle crease. Then unfold them.
Step.5. Then fold all the corners so that they meet the nearest crease.
Step.6. Fold back the edges of the middle so that they cover the corners.
Step.7. Then put a finger inside each corner and pull gently outwards.
For your finally touch pinch the corners and smooth the sides to make them stand up.