Several 3- to 5-year-old children participated in this study designed to discover the necessary procedures to establish nonresponding in preschool children during delay of reinforcement. The children were divided into two groups: (1) the programed group (PG), to which a 60-second delay period was introduced gradually and (2) the baseline group (BG), to which the 60-second delay was introduced abruptly. They were told to push a button, which sometimes resulted in the child's receiving poker chips which could later be exchanged for a toy. During the test sessions the BG was reinforced on a variable interval (VI) schedule of two to nine seconds. The abrupt delay condition was introduced on the first response after a VI, and no reinforcement occurred for responses until 60 seconds had elapsed. The PG received the gradual 60-second delay condition, in which the duration of the delay was increased in 2-second incre ents. In both groups, supportive stimuli (a tone and a light) were used to indicate the delay period. Results of subject response data indicated that children of this age can learn the discrimination involved, but at least one PG subject did not learn it. The BG subjects did not appear to learn to discriminate between responding during the VI schedule and during the delay condition. (WD)