Interested in finding a fun way to work some cooperative learning AND science and engineering into your day? This 30 minute lesson is a great way to do just that--and it's free! Everything you need to get started is included in this one page freebie--with the added bonus of a link to a blog post with full color photos and details about how to do it.When students work through the process of planning, building, testing, and revising--they really are acting like engineers. It's a fun way to get