In the 60s the invention of the spirograph initiated a hype: kids all over the world were keen on drawing fancy curves and spirals by means of this toy.
The spirograph consists of a set of plastic disks and rings in various sizes. The edges of all dics and rings have teeth and thus engage with each other like gear wheels.
The discs have little wholes in which a point of a pen has to be placed. While moving the disc the pen draws spirals on the ground, similar to this one, only that the discs have no “crossbeam” and the spirals are drawn inside the circle:
Here is a clever young lady who invented a spirograph business card, cut from acrylic with a laser cutter.
Great idea! The person who receives the business card can tinker about with it and finally design and draw his own spirals. As with time the discs might get lost, we recommend to place the contact data on the frame, just like she did 
