Elmo, Tamir, and Alan are building a pet robot dog for Norbert the Robot. They finish putting the pieces together, but the tail is droopy. This is a problem! They wonder how they can make a happy, �waggedy� tail. What if they use a wooden paint brush so the tail can stay up and wrap it with shiny foil? Let�s try! It works. They didn�t give up and made the robot dog�s tail shiny, happy, and extra �waggedy.�