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Marble Parkour
ROLLER COASTER DESIGN - This Waterwheel Coaster 3D puzzle is like a real roller coaster, after the assembly, the ball can be rolled along the track. These designs are inspired by real-life mechanisms. Items Included: Wooden Pieces, Steel Balls, etc. Number of Pieces: 254 Difficulty Level: ★★★★☆☆ Assembly Time: About 6h Age: 14+ Package Size: 318*234*48mm Assembly Size: 255*235*185mm