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.Details:4.8" x 11.2" x 2" (12.2cm x 28.4cm x 5cm) package sizeRequires Gecko Run Starter Set (sold separately)For ages 8 and upContents:2 extra tracks4 adapters2 metal marbles1 sheet with nano-adhesive pads1 track bridge1 track turnSnake backSnake front