This book is intended to serve as a resource and stimulant for professionals involved in recreational and educational programs serving elementary-school-age learners, although many of the activities also work well with adolescents and adults. The setting for the 40 activities which are described is the out-of-doors. Instructions on how to use the book include criteria for selecting activities, suggestions for adapting activities for special groups, and a description of activity modes (didactic, exploratory learning, adventure, stress/challenge). A chapter, "The Art of Being an Effective Facilitator," precedes the description of the activities and includes a discussion of 10 principles that should be considered by effective and responsible facilitators when planning outdoor experiential learning activities. The activities, which are generally group activities, are presented in four sections: (1) "Teamwork Activities"; (2) "Outdoor Skill Acquisition Activities"; (3) "Outdoor Recreation Activities with Academic Application"; and (4) "Outdoor Physical Fitness Activities." Many of the activities focus on group problem solving, effective communication, and respect for the natural environment. Each presented activity features a general description and objectives, variations, group age and size, equipment and facilities, safety and environmental considerations, time requirements, and number of facilitators required. (IAH)