Instructions
Place the Spirograph baseboard on a flat surface. Lay a sheet of drawing paper on top of it, and pin each corner of the paper to the baseboard.
Choose whether you want to use the plastic guide bars or a gear ring and pin your choice in place on the paper and baseboard.
Place a gear inside the gear ring or guide bars with the plastic teeth interlocking.
Put the tip of one of the four colored pens into a hole on the gear and move it around the guide bars or gear ring. Ellipses will form on your drawing paper.
Change to a different color pen and use a different hole on the gear--or a different gear altogether--to change the design of the ellipses.