A project that I am very proud of is a series of Spin Master’s “Impossible Puzzles.” These are standard 2D “jigsaw” puzzles, but with a lot of extra features to make them more challenging for the avid puzzle solver. Each edition, I’ve tried to add a little more to improve the design and increase the fun. Here are the main features:

• Two Lenticular States: The Puzzle will look different as you move around it or move the individual pieces. The Lenticular process also adds some depth to the image.

• Irregular Borders: This gives you a larger perimeter than a standard rectangular puzzle and, therefore, more pieces, especially more corner pieces.  

• Extra Pieces: The extra pieces do form a separate puzzle, but they look like they belong to the main puzzle.

The Rubik’s Edition was the first. The second version is Tetris, which you can see here. The 3rd edition is finished but hasn’t been announced, and the 4th edition is underway.

You can purchase this puzzle at Walmart and other stores .