"The paper contributes to the literature on children'. "cognitive mapping." This is part of a larger study of the development of' sap symbol formation in children aged five, six and seven years. Two different media for representing environment., modelling blocks and pictures, are compared. The paper describes and interprets individual difference, in the types of symbol. that children made for places in a fantasy environment. Differences in how these symbols were decoded is also examined. Presentation will be made via video tapes and color slides. Implications are drawn for future research in cognitive mapping, educational, practices and participatory planning and design."