It's time to practice your building skills as you get ready for prototyping! Find the bag in your activity kit and accept your mission to design a track that will move your marble from start to finish as slowly as possible. No gimmicks! Once launched, your marble must remain in motion and you are not allowed to touch it until it reaches the end of the track. Use at least some of the materials provided but feel free to add materials of your own to help you achieve your slo-mo goal. After your first try, iterate…what could you add or change to make the marble move even more slowly? Good luck and have fun! Submit a picture of your track, explain how you slowed your marble down, and include a video of the marble’s journey to earn the Fish & Cox Badge. Hover over the badge on your team page to learn the surprising story behind the development of Silly String.