Lyon's company, The Lyon Puppets, built and maintained the puppets used in all North American productions, and several of the international productions, including those from the UK, Australia, Mexico, Argentina and Brazil, while supervising the construction of those from the Finnish and Swedish productions. Their unusually sturdy construction, with double-stitching, reinforced seams, steel boning, and custom fake fur and feathers, is necessitated by the rigors of an eight-shows-per-week performance schedule. Three distinct types of puppets are used in the show: Rod puppets Single Rod: Princeton, Kate MonsterDouble Rod: Rod, Lucy, The Bad Idea Bears Rod puppets consist of a head and a torso with two arms, at least one of which is movable for gestures. "Single rod" puppets have one movable arm controlled by one rod, with the other arm "posed" in a permanent gesture or attached to the puppet's torso; both arms are movable on "double rod" puppets, each controlled by a separate rod. The puppeteer controls the puppet's head and mouth with his or her dominant hand, and holds one or both rods in the other hand. Live-hands puppets Nicky, Trekkie Monster, Mrs. Thistletwat Live-hands puppets require two puppeteers, each of whom contributes one hand and arm dressed with a long sleeve and glove matching the puppet's costume, which become the arms and hands of the puppet. The speaking puppeteer controls the puppet's left hand, head, and mouth, while the second, silent operator controls the right hand. (Sides are sometimes reversed if the speaking puppeteer is left-handed.) During the show, one puppeteer will sometimes exit to take over another puppet, leaving the live-hands puppet with a single operator and only one functioning hand. In a variation, one or both of the puppet's hands can be attached to its torso to permit operation by a single puppeteer. Mechanized and free hand puppets Mechanized puppets are not directly controlled by the puppeteer's hand. Instead, they are controlled by a concealed trigger that when pulled causes the mouth to open. The motion is similar to a toy grabber. Princeton's cardboard boxes, also used in "Purpose", are examples of such puppets. Free hand puppets do not have rods, mechanisms, or live-hands for their arms. While their head controls are the same as a rod puppet, the hands are moved by physically picking them up and moving them. In the show Ricky is the only puppet with this design because it is intended