1) Cut out the square
2) Fold along both black dashed lines and open
3) Fold the blue dotted lines so that numbers are on one side and colours on the other
4) Put the sheet number side up
5) Fold along the red lines so that the numbers are hidden
6) Fold in half so you can just see the single disk cards, 2 on each side.
7) Open up your chatterbox. Can you learn all the numbers?