The ever-imaginative little character， Simon， dreams of being the ringmaster of a circus. In a cardboard box he creates a circus with his animal friends， but his efforts to stage the show are frustrated. When he acts as lion tamer to a paper lion， a goat tries to eat the star attraction. When he tries to walk a tightrope， he is foiled by a flock of tame birds.As usual his sensible friend， Marlene， comes to the rescue. Her common-sense advice saves the day and Simon creates a circus that will never be forgotten.，Simon imagines himself a circus animal tamer