Learning science and engineering principles by building and testing model structures and vehicles, kids work in teams to solve 24 technology-based problems. Teacher pages lay out directions; each activity description includes an overview, self-directed opening activities, a demonstration by the teacher, a related reading (from a section of reproducible handouts titled "26 Stories for Young Inventors"), procedures for the activity, homework extension ideas, and a list of suggested resources. Grades 4-8. Illustrated. Good Year Books. 120 pages.