Several years ago I made a small series of what I called "123 Pocket Puzzles". They are simple 1x2x3 puzzles based on the same mechanism, which was designed and built from scratch. I called them Pocket Puzzles because the contouring of the shape allows them to fit easily into your pocket without any sharp corners to poke you.
The puzzles are made of cast urethane, which was tinted prior to pouring the parts. The masters were made on a Sanders 3D printer (now Solid-Scape), and the molds (which no longer exist) were silicone.
The first puzzle in the series used simple straight cuts:
Pocket 123 Straight.JPG [ 179.93 KiB | Viewed 1773 times ]
For the second puzzle I curved the cuts, and polished the masters prior to casting for a smoother finish:
Pocket 123 Curved.JPG [ 177.1 KiB | Viewed 1773 times ]
In the third puzzle, I changed the design more radically to allow part of the mechanism to show, creating a much more visually interesting puzzle:
Pocket 123 Wavy.JPG [ 178.41 KiB | Viewed 1773 times ]
Here's a video
I hope you enjoy!