Fold your square sheet of paper in half and unfold.
Fold the left and right sides into the middle crease you just made.
Fold the inner edges away from each other and unfold.
Fold all the corners to the previous crease you made.
Fold the inner edges away from each other along with the previous creases.
Open it up slowly.
Push this part downwards (as shown).
Crease this line (where my fingers are pointing). Do the same with the other side. Shape the box carefully.
And done! You can put little things in it if you want, like beads or paper clips.