Bozo the Clown(1954)

The pilot episode in a series about a little girl named Amy and her clown doll, Bozo, who comes to life when nobody else is around. In this episode, Amy finds herself trying to convince her father that Bozo is real and that she can talk to their dog, Truesdale. Meanwhile, a neighbor's hen disappears and Truesdale gets blamed. Bozo and Amy help to prove that Truesdale was not the culprit. In the process, they take "shrink pills" in order to make themselves smaller, talk to a squirrel and an owl, and Bozo makes himself invisible.