Use the thumb tack to
mount the disk at it's center-point to the eraser on the pencil. The
disk should be able to spin freely (it should look like a big lolly-pop).
Take the HamsterScope and go into the bathroom (or
some other place where you have a mirror and bright light).
Turn the 'scope so it's facing
the mirror. Spin the disk and look through the slits.
to find out how it works!