What is the difference between reflection and refraction? A puzzling question lands you in the wondrous world of light. Have hands-on fun by mixing oil and water, and get to know Zhang Heng, a great polymath, who figured out the Moon reflects light like a mirror. The place to go to answer all your science-related questions - it's the One Stop Science Shop. Do-it-yourself experiments, a hologram entry phone, and fun stories about great scientists help visiting kids to understand some of the trickiest principles of science.