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This is an excellent activity to incorporate a little engineering into a unit on electricity. Students are not asked to recreate the bulb, battery, or test leads. They are just to combine them with other materials to create a working flashlight. One interesting aspect of this project is that all of your students will be familiar with working flashlights. They will not all use that prior knowledge to create a basic working flashlight.
One key engineering element is to create a switch. This activity is as much about making a functional switch as it is about the flashlight.
There is not much to give you here, so I am making this one free. There is a list of materials and directions. I typically have not completed a grading rubric for this activity, and there are no questions.
I would typically allow one or two class periods for this activty and it would be after we have discussed the basic engineering process: identifying a problem, brainstorming solutions, building a prototype, and refining our designs.