Fractal Tray Puzzle, 2026 New Mind Bending Wooden Jigsaw Puzzle, Hard Difficult Reverse Thinking Challenge, Unique Irregular Creative Labyrinth with Frame (4pcs-Mix)

【Hilbert Curve Fractal Core Design】Rooted in space-filling Hilbert curves, these puzzles split a single continuous line into interconnected, unique pieces, pushing your problem-solving skills to the extreme with a mind-bending challenge 【 Reverse Thinking & Spatial Logic Training】No printed images, just similar-shaped precision pieces - they force you to rely on logic, memory, and spatial reasoning, delivering an upgraded brain-training experience for adult puzzle enthusiasts 【Laser-Cut Premium Craftsmanship】Crafted from solid wood or smooth brown veneer with ebony-stained backs, each piece is laser-cut for flawless fit, boasting smooth edges, firm interlocking, and 1/2-inch thickness for a substantial, durable feel 【Tricky Yet Rewarding & Versatile Fun】Devilishly difficult but incredibly satisfying to solve, they offer stress relief through deep thinking, perfect for solo sessions, family collaboration, or competitive group challenges - a screen-free joy 【Compact Travel-Friendly Gift】With a portable size (13.7×12cm to 14.7×14.7cm) that fits in backpacks, it’s ideal for flights, office breaks, or home nights. Suitable for all skill levels, it’s a thoughtful gift for puzzle lovers and collectors, Manufacturer: Zoikzuip