NPU, or “Nice Part Usage” is often a hallmark of the LEGO creations we feature here at the Brothers Brick. The Sludge Diver by djokson is a prime specimen. A specimen of what, exactly, remains up for debate. It seems likely those eyestalks are partially composed of dinosaur tails, but the bulk of the diver remains hidden behind that fascinating bit of protective gear. Combining Duplo tubes, rubber tires, and even the packaging from the 8050 Bionicle Kraata booster pack, this explorer is ready for whatever life throws at them.