The all-Spanish version of the Outdoor Biology Instructional Strategies (OBIS)/Mini-Corps Outdoor Activities set contains twenty education and recreational activities which provide a variety of outdoor biological experiences and incorporate language skills into outdoor education. Prepared especially for use by migrant children aged 10-15 in a summer camp environment, the activities employ educational games, experimentation, observation, and simulation in the study of plant and animal organisms on land and in the water. Each activity is presented in an individual water-resistant folio, complete with introduction, materials list, preparation, action, and language development section. Presented in three parts (discussion, games, vocabulary) the language section is designed to take advantage of the language possibilities that arise naturally from each activity. The package contains three additional folios which explain fundamental OBIS activity concepts, describe how to use the materials and activities, and give directions for the construction of simple equipment such as dip nets and aquatic observation chambers. A bilingual version of the same package is also available. (SB)