Penelope K, by the way - Boomerang

Penelope K runs the Information Station, a place which contains all the answers to any question a child might have. To help her find the answers, Penelope is joined by her sock puppet, Squirm; Hank and Frank, two wise cracking fish; Trewey, the shadow rabbit, and music is provided by the Rubber Band. Penelope K's investigations as to what boomerangs are for lead her to believe that they might fly like birds. However, it's unwise to throw one unless an invisible stranger is there to throw it back again, as you might lose it forever. When the child returns and throws the boomerang himself everyone is amazed that it flies right back to him. Boomerangs are very special indeed. When you throw them they fly right back to you!