Invention Exchange (Segment One): Joel invented a "neverlight pipe" with a sprinkler system activated by a smoke detector which puts itself out whenever you try to light up. Larry & Dr F. realized that children adore puppets and putting things in their mouths, so they invented "tongue puppets": puppets that you put on your tongue. Segment Two: Inspired by Lori Nelson's uncanny resemblance, Joel and the bots present their tribute to TV's Greg Brady Segment Three: What does Gypsy think about?