One of the funniest writing professional developments I ever attended included a live demonstration of the teacher following written instructions for making a Peanut Butter and Jelly Sandwich. By following only the instructions on the paper, the teacher ended up making a huge mess. The point was to show that we often forget some important specifics when writing a “How To” paper. YouTube’s Josh Darnit has a video you can show your students to get the point across without having to stick your own hand in a jar of Jiffy. He assigns his children the task of creating “exact instructions” for making a PB&J sandwich, and chaos ensues.
I showed the video to my students in Robot Camp, and they immediately understood the connection – that programmers can’t assume the robot or computer knows what they are thinking, and if something goes wrong you need to go back and fix your mistake instead of blaming it on the device.
You should note that this particular video is labeled, “Classroom Friendly,” and I can attest that it is appropriate. I can’t vouch for any other Josh Darnit videos or “Exact Instructions” on YouTube.