This was a really fun STEM engineering project. It was perfect for our discussion on the Maker Movement and low tech Makes. My students (who are preservice teachers) were given a variety of materials: duct tape, toilet paper rolls, straws, balloons, rubber bands and craft sticks. They were asked to come up with a machine to launch a marshmallow. They were asked to think of original ideas and use the Design Process of Designing, Testing and Redesigning.