This is one of my favorite tasks of all time, and a fun illustration to complement a discussion of lateral thinking and creativity, and ties to functional fixedness. I usually play this video to support a discussion of problem-solving, and how schemas constrain our approaches to problem-solving. It pairs nicely with the more classic examples, like the Candle Problem and Two-String Problem.
The entire task runs from 14:12-20:40, and be aware that there is a bit of colorful language shortly after 20:40.