Cubes that keep you guessing and rails that go the distance really ramp up your marble run fun! The unique design of Q-BA-MAZE cubes allows for a limitless range of configuration options. The 7.5-inch straight-away rails connect easily to any cube or to each other to create tracks that send your marbles zigzagging through the maze of colorful cubes. Plus, the precision engineering of the double-exit cubes gets everyone wondering, "Which way will the marbles go?" 138-piece set Includes 36 Single-Exit Cubes, 18 Double-Exit Cubes, 8 L-Exit Cubes, 18 Bottom-Exit Cubes, 2 Quad-Exit Cubes, 4 Coaster Tubes, 4 Marble Catchers, 18 Straight-Away Rails, 30 Steel Marbles Recommended for 1 or more players, ages 6 and up WARNING: CHOKING HAZARD - Small parts Not for children under 3 years of age Made in China Imported Product Specifications 14 in x 14 in x 9 in Material & Care Plastic Wipe clean with dry or damp cloth