Early elements in an operant chain of toilet behaviors were trained in three normal infants and five retarded children. Following that, eliminative behaviors were conditioned by operant procedures. Each child was equipped with an auditory signalling device that gave cues to the learner. Baseline behavior was recorded for a period of five days. The procedure for training consisted of two steps. First, a response was obtained through physical, verbal, and auditory prompts. Second, prompts were faded until the child responded in the presence of the auditory signal. When the device was removed the child performed without the auditory prompt. Parents were instructed in a similar procedure to enhance generalization in the home. Seven of the eight subjects reached a criterion and maintained that behavior during three criterion sessions.