What's included: The Spinners Expansion Pack comes with over a dozen parts to complement the Gecko Run Starter Set. Included are two gear wheels to add some spinning action to your marble run-use them individually or together for surprising effects! The kit also comes with two additional tracks, marbles, and nano-adhesive pads. Extra stunt for vertical Marble Run Starter or Deluxe Set; Fast, no-mess setup with residue-free nano-adhesive pads for hours of creative play Innovative: Design your own vertical marble runs with this specially designed system of flexible tracks that does not require any support structures, allowing you to build higher with fewer pieces.