Game on! The Gecko Run Challenge Edition includes everything you need to challenge yourself or others to a marble-run-building competition. With 32 challenge cards, two rapid-fire launchers, and enough parts for two kids (or two teams) to build their vertical marble runs at the same time, this set turns Gecko Run into a fun, thrilling engineering game.  The open-ended challenges set rules such as using only the specified parts in an allotted amount of time to achieve a stated goal, like the longest run or the fastest run. There are many possible solutions to each challenge, making them excellent for hands-on engineering design activities. A 16-page, illustrated manual guides you through setting up your first runs and teaches you how all the different elements work. Then draw a challenge card and see if you can win the challenge! Use independently or combine with any of the expansion packs. Who will reach the goal first?! With this starter set, Gecko Run becomes a fun game 32 challenge cards ensure hours of tricky challenges whether playing alone, in a team, or against each other