This assignment is one that I created to give students a chance to invent a tool or machine that could be used to reduce our use of earth's natural resources. Students work in groups to brainstorm, design, and sketch their products. Then, they will compose a script for a commercial in which they will attempt to sell their inventions. Each group records their commercials and then commercials are viewed by the whole class on presentation day. My classes last year had a BLAST with this project and completed it from start to finish in one week (5 class periods).