Completed Lid and Instructions

I have made the lid out of 2mm thick card. To make it I simply cut out a rectangle that was large enough to fit over the box and left enough around the edge for making sides to the lid. I then cut it out, cut the little corners out, then folded the sides down and taped them together. 
To let the user know what to do with each group of cards, I have glued instructions on the lid to explain what to do for each set. The lid is the best place to put the instructions as its the easiest place to read off while trying to feel the cards.
Here is a couple of photos of the lid: