The Zoocus was Jim Henson's proposal for a variety show with Muppets sometime around 1960, combining the words "zoo" and "circus". Sketches exist for a possible set layout consisting of walls with colonnades much like those seen later in the second season opening of The Muppet Show. Illustrations suggest that human guest stars would interact with the puppets in this way so that the puppeteers would not be seen. Henson would later decide to use the frame of the television to do this. Sketches and further details can be found in the book Jim Henson's Designs and Doodles.