Mind-Bending Fractal Challenge - Based on space-filling Hilbert curves, these puzzles break a single continuous line into unique, interconnected pieces that test your problem-solving skills to the limit Advanced Geometric Jigsaw - Enter an advanced realm of fitting together precision-cut fractal shapes, offering a stimulating and deeply engaging wooden puzzle experience for the brain Insanely Tricky But Fun - Devilishly difficult yet incredibly satisfying to solve, these puzzles provide stress-relieving relaxation while creating opportunities for family connection and collaboration Superior Craftsmanship & Safety - Crafted from high-quality wood with meticulous workmanship, these puzzles boast a smooth surface free of burrs, ensuring a safe and enjoyable puzzling experience for all ages. Perfect For All Ages & Skills - Whether you're a seasoned puzzler or just starting, these fractal puzzles offer adjustable challenges suitable for various skill levels and make exceptional gifts for curious minds Item Name: Jigsaw Puzzle Material: Wooden Category: Flat Puzzle Features: with Frame, Reverse Thinking, Fractal Design Size Details: A, L: 14.7cm/5.79", W: 12.7cm/5", H: 0.8cm/0.31" (Approx.) B/C/D, L: 14.7cm/5.79", W: 14.7cm/5.79", H: 0.8cm/0.31" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 Set of Jigsaw Puzzle