What you'll need:
-crayons, colour pencils, etc. (and fixing spray)
-blunt scissors or a blunt knife
Step 1: Cut & Decorate
Then, draw a rectangle which will be the "body" of the box. Decorate it as you like.
You can choose their sizes as you wish, just remember:
-The width of the rectangle will be the height of the box.
-The length of the rectangle needs to fit around the circle (multiply the diameter of the circle by pi !)and you need at least 2 cm extra to glue it.
-BEFORE cutting out the rectangle: make sure to leave an extra cm on one length.