What tangible object does a Architect, a Math Teacher, and a Computer Engineer have in common?

For a "Career Management" cl in school, we have to make a presentation in groups. This presentation has to include a "live product"; i.e. something tangible that we built. It has to tie together the different careers within our group, something that relates to all of us. The three careers in our group are: Architect, Math Teacher, and Computer Engineer. We don't know what to make that relates all of this! Suggestions?