Students can build items to show structural, mathematical, or architectural principles and relationships. Many projects can emphasize user-centered design - homes for humans/animals, access ramps for wheelchair users, and playground structures for youth vs. adults, etc. Structures give students a chance to go hands-on with Math concepts (area, scale, perimeter, volume, cost) and Physics concepts (strength, weight, friction, etc). “Fit projects” challenge students to create structures that go on, around, or in a pre-existing object, ideal for both teaching new technology to beginners and practicing iterative design work. Best of all, students can integrate familiar items - even stuff they keep in their backpack - into a design.