Students conduct scientific investigations and use the engineering design process to solve a problem related to an adaptation of the story of Little Red Riding Hood. The scientific investigations engage students in gaining knowledge about light and sound, materials, data collection and analysis, and human performance. Students create and test their own safety vest for “Red,” research properties of light and sound, and apply their knowledge toward a redesigned safety vest. Students use the engineering design process throughout this 10-lesson collaborative, inquiry-based unit. Students engage in a real-life type of problem through literature, and then build background knowledge that informs their designed solutions.