The episode's original teleplay had two scenes in which dialogue was recorded for but never animated nor shown on TV, one featured Ralphie comparing the motion of sound waves to ripples moving in water in a "report" segment preceded by Ms. Frizzle remarking "An observation of a demonstration", in the other scene Keesha gave an extended explanation of how an echo is made. The unused dialogue was included on an audio cassette adaption of the episode titled Fun With Sound.