Most people know very little about what happens when light comes through a pinhole.
This activity provides an opportunity for teachers to experiment with pinholes and see how they work. Pinholes are an easily accessible, common phenomenon, and are a good starting point for inquiry because they create dramatically visible effects. They thus provide teachers with many opportunities to raise questions and begin to piece together their observations and understandings. Use what works best for you. The darker you can make the room, the better it will be for observations.