Lesson length: 1-2 hoursGrade level: 6-8This is a three part lesson where students (1) explore elements (and their properties) that are used in materials to build and power a cell phone (any easily accessed, small, electronic machine could stand in for a cell phone), (2) approach activities though an engineering design thinking lens and participate in an active simulation of the movement of electricity (electrons) to power a device, and (3) participate in a Lego build where they experience set constraints to their building project. This can be related to the constraints engineers face as they build cell phones (or anything else).This material is based upon work supported by the National Science Foundation under Grant No. 1657263. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.