lay colored side down
Fold into thirds, both directions
Fold upper and lower edges to the first horizontal crease
Rotate 90 degrees
Fold upper and lower edges to first horizontal crease
You have brought out the hidden edges...
Turn paper over
Fold upper and lower edges to the center
Onto the next step
Valley fold the model in half, top to bottom
Open out the pockets
Voila! An Origami Pin Tray! All that's left to do is put some pins in it!