Outdoor play on a sunny day offers many opportunities for your child to explore shadow and light. Encourage your child to notice her shadow. Is it in front of her or behind her? Can she run away from her shadow? Join in the play and your child can observe how your shadows interact with each other. Try making your shadows touch or hold hands. Can you make both your shadows into one shadow?
Me and My Shadow
Shadows and Reflections, by Tana Hoban.
Whose Shadow Is This?: A Look at Animal Shapes - Round, Long, and Pointy (Whose Is It?), by Claire Berge.