Step 1. Cut the top covering off so that its open.
Step 2. Cut one piece of cardboard to fit from one side to the other, standing up.
Step 3. Cut a piece of cardboard to fit from one side to the middle.
Step 4. make sure they fit together well.
Step 5. Take pieces out and optionally spray or normal paint them,
Step 6. If painted let dry and glue pieces in place.
Step 7. Print out a calendar and staple it on or glue it on.
And enjoy the pen and utensil organizer!