Create a maze of tubular fun and watch your marbles go down the structure! Includes 2 spirals for even more fun!From the ManufacturerThe Quercetti Marble Run Double Spiral comes with 2 new spectacular spirals and 108 pieces, this Marble Run set is sure to entertain for hours. Great creative construction toy for your aspiring engineer. The Quercetti Marble Run Double Spiral comes with 2 new spectacular spirals and 108 pieces, this Marble Run set is sure to entertain for hours. Great creative construction toy for your aspiring engineer.