Make your own shadows.
- Set up a light source (use a lamp or even the flashlight from a cellphone) and project it against a wall (the lighter the wall color, the better) then turn out the lights in the room.
- Put objects between the light source and the wall. What do you see? Is the shape of the shadow the same or different from the object?
- Move the object further away from the light source. What happens? What if it’s closer?
- Move the light source to a higher angle. What happens?
- What happens if you use a larger light source? A smaller one?