How do you make a shadow stick?

To make a shadow stick, you'll need a straight stick or pole about 1-2 feet long. Place it vertically in a sunny location where it can cast a shadow. Mark the tip of the shadow at regular intervals throughout the day, noting the time next to each mark. This will help you observe how the position of the shadow changes with the sun's movement, demonstrating the relationship between the sun's position and shadow length.