This booklet, revised from the March 1990 version, provides suggestions for reassessing, modifying, and arranging child care center environments to best serve the needs of children and staff. The booklet notes that a well-planned environment can provide young children with appropriate and challenging learning experiences within a consistent and secure setting. Such an environment also allows staff to become involved in meaningful, intimate interactions with children by reducing the time required for organizing and reorganizing furniture, rooms, and equipment. The booklet recommends that the ideal center include distinct areas for: (1) active physical play; (2) manipulative play; (3) messy and creative play; (4) kitchen or dramatic play; (5) quiet play, music, an storytelling; (6) personal storage; (7) curiosity and sensory activities; (8) outside world or real life experiences; (9) seclusion; (10) eating; (11) diaper changing and toilets; (12) sleep; and (13) dressing and undressing. Sample floor plans are provided. Contains 22 references. (AA)