Cut some different shapes from cardboard or any stiff paper. Tape sticks or straws to the shapes so you can hold them up in front of a bright light and see the shadows on a wall or other surface.
What happens when you turn them? How about when you move them back and forth? What about when you hold up two of the shapes together and then move one behind the other, or in front of the other?
Make up names and voices for your shadow puppets and have fun telling a shadow story! If your child enjoys this, try making shadow puppets out of other objects like socks or mittens.