The fourth of seven modules for professionals working with young (birth to age 3) handicapped children provides information on equipment, materials, and activities in early intervention. Background information discusses ways to catalog materials and equipment and describes teaching approaches using toys and manipulatives. A variety of teaching sequences are presented with information on concept, purpose, materials needed, presentation, new words, and sequence of activities. Sources for toys and manipulatives are listed. Following a brief consideration of criteria for material selection are annotated descriptions of four books on the topic. Information on playgrounds and equipment is also provided. The final section presents annotations on the following topics: commercial materials and equipment; material construction; instructional/activity books for six areas, including art, cooking, and self concept; books for children (understanding feelings and concepts and understanding handicaps); audiovisuals and records for children; and catalogs. (CL)