Use chalk for tracing shadows on cement surface, or use a large paper and marker for tracing shadows inside
Shadows are formed when opaque objects come between a light source and the 'ground'. The relative position of the sun or light source affects the direction of the shadows it forms.
Can you make your shadow big or small? Can you hide your shadow? Can you make your shadow touch another shadow without bodies touching? Can you make your shadow point different directions? Can you make your shadow not touch your feet?
Investigate shadows at regular intervals during the day; note the changes in size, shape and position.
Design and make shadow puppets from light card and pop sticks.
Search for shadows of various objects, and try to discover the light source and where it is coming from.
Create finger shadows on the wall of a darkened room, using a flashlight.