Bring CAD and 3D printing to life with a high-engagement, beginner-friendly project!In this 3-day unit, students will use OnShape (free, cloud-based CAD) to design a custom 3D-printable keychain featuring their own name. This project walks them through the entire engineering design process—from sketching ideas on paper to exporting an STL file for printing. Whether you’re introducing parametric modeling for the first time or need a plug-and-play STEM activity, this resource has everything you n