This reminds me of my intro to Computer Science class. My professor started us off with the Peanut Butter & Jelly Algorithm exercise [1]. I loved it. Nothing destroys your confidence quite like seeing a grown woman smash a peanut butter jar as hard as possible into an unopened loaf of bread.
[1]: https://duckduckgo.com/?q=algorithm+for+making+a+peanut+butt...