The 4-Piece Jigsaw Puzzle by Wil Strijbos is a minimalist and deceptively challenging puzzle crafted from anodized aluminum. Despite its simple appearance with just four interlocking pieces, it requires logical thinking and spatial awareness to disassemble and reassemble into a perfect square. Strijbos, renowned for his innovative mechanical designs like the Lotus and Aluminium Cross, is known for blending high craftsmanship with intriguing problem-solving experiences. This puzzle's beginner-friendly difficulty level and satisfying design make it a favorite among collectors and enthusiasts alike​.