In this activity (pages 7-16), learners model various crystal structures with LEGOs. This activity also contains additional links that explain how to create other crystal structures. This activity helps learners to understand crystal structures. The LEGO bricks, with their many colors and points of connection, are excellent tools for demonstrating the nanostructure or even the atomic-level structure of solids. Educators may also be interested in a solid state model kit produced by the Institute for Chemical Education (ICE), which uses spheres of different sizes in a Solid State Model Kit to create three-dimensional structures.