Illustrating metal deformation at the atomic level using egg crate cartons

The video shows how you can illustrate metal deformation at the atomic level (with slip planes and dislocations) using egg crate cartons.  Metal deformation using slip planes can also be illustrated with flat paper cutouts with six-fold symmetry.  These paper lattices can be used on an overhead projector for demonstration to an entire class, or they can be constructed and studied on individual bases by students. 
See: K. F. Robinson, P. N. Nguyen, N. Applegren, D. J. Campbell, “Illustrating Close-Packed and Graphite Structures with Paper Snowflake Cutouts” The Chemical Educator, 2007, 12,163-166.