What's included: The Flex-Corner Expansion Pack comes with over a dozen parts to complement the Gecko Run Starter Set. Included are 90-degree outlets and track bridges so that you can quickly change the direction of your marble run, bend around corners of any angle, and tackle obstacles with ease! 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. Intuitive & Mess-free: Tracks attach to smooth surfaces with the help of clever nano-adhesive pads that create a strong but temporary bond; the pads are not glue-based and can be quickly and easily repositioned without leaving behind damage or sticky residue. Open-ended & Educational: Combine different configurations and environments for endless possibilities; develop engineering and problem-solving skills and see physics in action. Gecko Run Flex Corner content This expansion is only playable with the Gecko Run "Starter Set” or the ‘Big Box Whether over obstacles, on doors, glass panes, tiles or shelves - the "Gecko Run” tests what is possible! The kit has no restrictive support structure and doesn't clutter up the floor so children aged eight and over can decide for themselves how challenging their route will be. Built from durable materials with tracks made from renewable raw materials - this marble run is eco friendly and is made in Germany. Easy to store - less clutter as can be kept off the floor. No sticky residue