Mister Rogers and Bob Trow make paper weights from seashells and plaster of Paris. He explains shapes and different kinds of seashells. In the Neighborhood of Make-Believe, King Friday XIII notices that Bob Dog and Robert Troll have the same eyes. At the Platypus mound, Robert Troll visits the new baby platypus and gives her a gift of a seashell. X and Henrietta are going to visit the new platypus. Back at the house, Mister Rogers and Bob Trow talk briefly about pretending and waiting.