With the Gecko Run: Snake Expansion Pack, you can send your marbles through a maze of sharp curves and see how it affects their speed. But watch out: only if you place the snake correctly in your marble run will the marbles make it through!  

The Snake Expansion Pack comes with over a dozen pieces to complement the Gecko Run Starter Set, including the Snake stunt; additional marbles and nano-adhesive pads; 2 extra tracks; and more.