Cobra, Hydra and Caduceus - Turning Interlocking Cubes

Not intended for children under the age of 14.

Purchases limited to two copies of each puzzle per person per release.

These puzzles are available to print for free (yeah, free!) at the following links for those that have a 3d printer: 
https://www.printables.com/model/1790927-cobra-turning-interlocking-cube-puzzle https://www.printables.com/model/1804055-hydra-turning-interlocking-cube-puzzle https://www.printables.com/model/1808226-caduceus-a-two-piece-burr-with-frame-puzzle

One purchase gets you all three TIC puzzles, where the goal is to get all the pieces inside a 4x4x4 cube shape.