Known for creating the best putty in the universe, Crazy Aaron has many other interest...like playing games! He created Ultimate Putty Challenge as a way to have even more fun with Thinking Putty. This collection of 25 fun, fast-paced games has something for everyone with head-to-head challenges, creative competitions, and skill-based activities. Plus, it includes four exclusive Thinking Putty tins you won't find anywhere else. Have a blast stretching, sculpting, and boucing your way to victory and become the Ultimate Putty Champion.