The Constructopedia is a building guide to help students create mechanisms for engineering challenges using low-cost materials like common craft and recyclable materials. Students can often struggle to assemble the pieces. They might spend so much time trying to attach wheels that they don’t have time to build the car they had planned. As a result, a team of Tufts CEEO students put together a student-facing Constructopedia with building instructions for common mechanisms – like pulleys, hinges, and wheels – from common craft materials and recyclables.