DESIGNER: Eric Fuller
RELEASE DATE: 4.25.2022
EDITION: 97 Copies Released
SIZE: 3" x 1"

After months of design, prototyping, and several delays, we have finalized our first coin release puzzle, "Pennytentiary." To solve this sequential discovery puzzle, you must release the penny trapped inside.

Pennytentiary's complexity and depth rival that of our trickiest puzzle boxes. The solution is very challenging, with multiple "aha" moments to be found. Success relies upon the discovery and use of various tools to execute more than dozen confounding moves. No force, tapping, banging, or dexterity is required. Pennytentiary ships in an unsolved configuration.

Reviews and Blog Posts:

  • FiveSinatras posted a great blog review of this puzzle.
  • Allard wrote a fine review on his Puzzling Times Blog Post.
  • Mr. Puzzle's video review ** Spoiler Warning - this link contains the puzzle's solution** here

This puzzle contains small parts and should be kept away from children. We recommend exploring Pennytentiary on a flat surface.

Precision wood puzzles can be damaged by environmental changes. Please read the Caring for Wood Puzzles guide to ensure proper fit and operation. We recommend occasional polishing with Renaissance Wax to keep wood puzzles in top condition.

Customer Reviews

Based on 5 reviews
Nick B.
So much in a little size

This puzzle is amazing. Alot of other similar sized SD puzzles while ranging in difficultly are usually limited to 1 or 2 tools. They also can be limited in mechanics/steps. Don't get me wrong some have proven to be just as hard or harder. But this one has so much packed into it. The steps and mechanics are amazing and as a true SD lover this really satisfied that itch. I would highly recommend this to anyone interested in SD puzzles.

Small puzzle packed with puzzling fun

Fun cute coin release puzzle. It may not look like much, but it is packed with mechanisms and there are many steps required to solve, with well hidden visual hints for many of the steps. Great fun to solve, and it also has some tricks to find for the reset.


Awesome little coin release puzzle !! Highly recommend anything from Cubicdissection. Can’t wait to see what Eric has in store for us next!! A+++

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