Skyrail Race 187 Piece Marble RunReady,Set Go! The Quercetti Skyrail Race is a roller coaster with a double track where you can compete in spectacular races with marbles. The two parallel tracks are assembled using suspension wires, designed to be used with multiple marbles. The suspension wires are not only to keep the structure stable but also to allow you to change the elevation of the tracks. Now you can race against friends and family with marbles or with the illustrated and