Visitors to a public museum were asked to study a museum exhibit and to answer programed questions using a punchboard coordinated with an audio cassette. The audio portion pointed out relationships in the exhibit and directed a visitor's attention, as well as confirmed his answers to the punchboard questions. Some visitors used the audio cassette alone, and some just viewed the exhibit. The effectiveness of these devices was evaluated by means of pre- and posttests given on a gamelike test machine. One unexpected result was that while the cassette punchboard system improved learning, so did simply taking a pretest before viewing the exhibit. This result led to the development and pilot testing of a "recycling" system which uses a gamelike, self-quiz machine that provides criterion questions to help the player identify the concepts to be learned, scores his performance, and gives a free-play token for a good performance. The positive results gained from the use of these interactive devices supports the idea that substantive learning can occur in a public museum. Results also suggest several possibilities for using programed, interactive systems to evaluate and to improve the learning potential of museum exhibits and other public displays. (JY)