Based off of da Vinci’s famous design from the 1400s, students recreate the United Kingdom’s Newcastle-upon-Tyne swing bridge and explore how bevel gears can rotate an entire bridge on a pedestal! By building their own bridges, students discover how real engineers have faced and solved problems, such as using swing bridges when rivers with boat traffic were too wide for drawbridges. Recommended for Elementary and up. Pre-cut wood pieces stand up to institutional use. Recommended for Elementary and up.