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. 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.