Step 1: fold the paper in half and fold other half to make quarters then unfold to make a crease.
Step 6: fold the paper in the middle over the top of the triangles as shown.
!!! Now Get Crazy And Decorate!!!
You could put a lid on it and turn it into a piggy bank.
you could make it a holder for some arty things
or you could make it in to a cool rocket jet.
Have fun with your box!