Here's a few pictures of their completed projects.
My students really enjoyed this project. After everyone shared their projects we talked about why I would assign such a project and the responses were overwhelming. Many said to practice math, to work on writing skills, to get better at talking in front of the class, to use creativity… and so on. I also added the fact that it gave them an opportunity to design, create (and some even said they had to redesign) their projects - those are great "pre-engineering" / scientific thinking skills.
If you'd like to do this activity with your students, I posted the project sheets at my Teacher's Notebook Store. Enjoy and I can't wait… two days until Spring Break!!!!