Get closer to the Quadrilla® action with three gutters that make your marbles race around the outside of the colored blocks on their way to the bottom. Looks cool and extends run time. A challenging resource promoting cognitive development in areas such as problem solving, hypothesising and strategising. Includes: 14 x Coloured Blocks, 8 x Height Adjusters, 4 x Base Rings, 6 x Accelerators, 2 x Marble Shutters, 3 x Curved Rails (Small), 1 x 3 Hole Rail, 1 x Twist Rail, 50 x Marbles, 1 x Spinner, 2 x Small Spirals, 1 x Catcher, 1 x Cotton Storage Bag. Made of wood, plastic and glass.