Ka-choo Brrr. Yawnnnn.Have you ever wondered what makes you sneeze when you're in a dusty room? Or shiver when you get out of the bathtub? Or yawn when you're tired? All of these actions are reflexes. Your body makes them happen even though you don't tell it to.Budding young scientists will be amazed as Melvin Berger and Paul Meisel reveal the mysteries behind the reflexes that happen in our bodies every day and offer fun-filled experiments to try on family and friends. Let's Read and Find Out Science, Stage 2.