Get closer to the Quadrilla action with three gutters that make your marbles race around the outside of the coloured blocks on their way to the bottom. Looks cool and extends runtime. A challenging resource promoting cognitive development in areas such as problem solving, hypothesising and strategising. Includes: 14 coloured blocks, 8 height adjusters, 4 base rings, 6 accelerators, 2 marble shutters, 3 curved rails (small), 1 three hole rail, 1 twist rail, 50 marbles, 1 spinner, 2 small spirals, 1 catcher and a cotton storage bag. Made of wood, plastic and glass.