Based on the premise that exposure to science and technology is important in early childhood curricula, this guide was developed to help teachers incorporate mathematics, sciences, and technology-related activities into existing programs. Activities contained in this guide focus on concepts in the physical sciences and in the development of visual-spatial and problem-solving skills. The guide has built into each activity ways to ensure that all children participate equally regardless of sex, race, or disability. Major sections include: (1) introduction (focusing on equity issues, early childhood environment, and the rationale for the guide); (2) using the scientific method with young children (explaining the format of the guide, nature of the scientific method, and the role of the teacher); (3) preliminary activity (creating a collage on what scientists do); (4) water and sand (exploring the concept of flow); (5) blocks (explaining momentum with ramps and balls); (6) bottles and liquids (concentrating on solubility, density, and viscosity); (7) machines (consisting of technologically oriented activities); and (8) resources (identifying math and science materials for children, teachers, and parents). (ML)