The Picture This lab consists of three activities that focus on the modeling and design of biocircuits. Students examine a two component sensing system that has been engineered to produce bacterial photographs. Picture This activities include a downloadable program to model the genetic system and change experimental parameters, an exercise to model the same system using electronic parts on a bread board, and an opportunity to send a stencil that will be turned into a bacterial photograph. While there is little emphasis on lab techniques, these activities provide the students with the opportunity to engage in modeling, an important engineering and scientific tool. They can then engage in discussions about the purpose and value of modeling and the strength of the analogy each model provides. It is recommended that the students read Chapter 8 in the BioBuilder Textbook for more information about the two component signaling system modeled in this lab.