Martin Raynsford makes beautiful and intricate wooden puzzles with space-filling fractal curves and is kickstartering a set of four.
The pattern is a single line that crosses all of the two dimensional space without ever repeating. The puzzles follow these simple rules to break the line into multiple pieces that are almost identical but are actually unique. The pieces are so similar in style that once they are placed into the puzzle it is hard to see where the pieces are. The puzzles can be tricky to solve even if you have the solution on hand.
The puzzles are made from a high quality 3mm, 6 Ply, BR Grade, Birch Laser Plywood sheet. It shows the natural look of the wood and will have natural colour variations. Each puzzle is 200x200mm in size, the pieces are 3mm thick and the whole puzzle inside the tray is 6mm thick.
For immediate gratification, you can also hit up his Etsy Store; the Cryptex box (Note that it's for PLANS only, you'll need to cut and make it yourself) looks like a great gift for the smartest egg in your family.