Get hopping with the Gecko Run: Trampoline Expansion Pack! Can you position the trampoline so that the marble flies really far? Can you even bounce it downward, or catapult it up to a higher track? See the physics of projectile motion, elastic collision, and trajectory in action. The Trampoline Expansion Pack comes with over a dozen pieces to complement the Gecko Run Starter Set, including a repositionable trampoline, 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 sizeFor use with Gecko Run Starter Set (sold separately)For ages 8 and upContents:2 extra tracks4 adapters1 track bridge2 metal marbles1 trampoline frame1 trampoline band1 sheet of nano-adhesive pads