Collect the materials : Milk carton (3), Bond, Scissors, Cloth, Pen and a Ruler.
Unfold the milk carton (fold it in half)
Use the second milk carton, ad cut into needed pieces. Look at the photo above
Use the third milk carton, and cut the bottom part with the height of 2.5cm.
Cover them with cloth
Combine them together using the bond.
Don't forget to cover the bottom part.