The K'nex Education series offers hands-on learning and challenges students as they explore scientific and design principles. The K'nex Education Real Bridge Building is specifically designed to assist student in their study of the history, function, structural design, geometry, and strength of bridges. Two strong storage trays with snap-on lids house over 2,280 pieces. Students can build seven bridges, two at a time. This set supports six-eight students working in teams, and is recommended for grades 5-9. Includes building instructions and a teacher's guide.