A child's attempt at humor in the midst of a psychoanalytic session is examined. A joke is told that began as a dream which the 4-year-old analysand attempted to modify. The joke is not entirely successful from a formal standpoint. This "failure" is examined from the point of view of the anxiety that may have derailed the joke and the developmental immaturity that may have compromised it. A developmental line of the symbolic process is suggested, double meanings and multiple meanings becoming more complex as development proceeds.