What you need:
- a sunny day
- sidewalk chalk
- a safe paved street, sidewalk, driveway or parking lot
How to:
- Working in pairs, have one person stand with their back to the sun so that they cast a shadow while the other person draws with the sidewalk chalk around the shadow, tracing the outline. Mark the time on the shadow.
- Return to the same place after an hour and repeat the activity. What’s changed? Why?
Extend this:
If you have access to large sheets of paper, create shapes in shadows and trace them onto the paper. Use paint, crayon or marker to fill in the patterns.