The impact of four half-hour science programs aired on commercial children's radio was assessed by Dr. Barbara Flagg of Multimedia Research in a causal-comparative between-groups study with prebroadcast and postbroadcast questionnaires. Of 253 fourth graders, 34% listened to one or more shows of the Kinetic City Super Crew series. Significantly more girls listened than boys. Listeners and Non-listeners did not differ on background variables of ethnic status, science attitudes, science reading and television viewing, and participation in seven of eight common at-home science activities