Mechanical Gifs Catalog

Each of the models below is available as a high-quality, laser-cut acrylic model in either kit or fully assembled form. All models come attractively packaged with everything needed to finish the model (even a screwdriver). No special model-assembly skills are needed: the models just screw together in typically 15-20 minutes.

Pi Proof

Pi Proof

from 14.95

This model physically demonstrates the meaning of the mathematical symbol “pi”, the ratio of the diameter of a circle to its circumference (distance around the outside). A disk rolls along a marked scale, showing how it makes one complete revolution just past 3 times its diameter, specifically at 3.141592… times its diameter.

Tiny gear teeth ensure that the disk can never slip out of alignment with the scale markings.

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