Stories and sketches are effective ways to explore interaction design concepts quickly and inexpensively. Sketches do not require advanced drawing skills and can take many forms, including storyboards, comic strips, photographs with annotations, and simple videos. They allow designers to rapidly iterate and test multiple alternatives early in the design process. While not as polished as finished designs, sketches are valuable for capturing dynamics, movement, and the overall user experience in a visual format that can be quickly understood and shared.