With theGecko Run:Twister Expansion Pack, you can give your marbles a real spin. This not only brings extra fun to your Gecko Run marble run, but also makes the laws of physics visible.

TheTwister Expansion Pack comes with over a dozen pieces to complement the Gecko Run Starter Set, including a twister stunt; additional marbles and nano-adhesive pads; 2 extra tracks; and more. For Ages 8 and up. WARNING: CHOKING HAZARD – Small Parts. Not for children under 3yrs. CHOKING HAZARD — Toy contains a marble. Not for children under 3 yrs.