This manual provides librarians with suggestions and patterns for decorations, promotion, resources (print, nonprint, and human), and activities and events for a community cooperative program providing library services to children during the summertime. Several ways in which the theme, Merlin's Midsummer Magic could be developed are suggested; e.g., emphasis on magic and fantasy, the magic of the world around us, or the world of King Arthur, with knights, castles and dragons. Included are ideas for a kickoff event, registration of participants, magic tricks, and children's games. A program materials ordering form and an evaluation form are provided, and resource listings give information about available performing artists and groups, realia, craft and construction aids, films, sound recordings, and theme bibliographies of children's books prepared by contributors and the Cooperative Children's Book Center. Administrative information includes a roster of planning committee members and contributors, the geographic distribution of committee members, the program announcement, a message from the coordinator, a fifth year progress report, and comparative materials purchase statistics. (RAA)