"Peep and the Big Wide World: Playing with Shadows" is an educational animated series that follows the adventures of Peep, a newly hatched chick, along with his friends Chirp and Quack. In this episode, the trio explores the concept of shadows and how they are created. Through fun and interactive activities, the characters learn about light, reflection, and how shadows can change in different environments. The show promotes early science learning and encourages curiosity and exploration in young viewers.