How did people know where they were heading before GPS? A puzzling question lands you in the wondrous world of magnetism. Have hands-on fun by constructing your own compass, and get to know An Wang, a computer engineer who revolutionised magnetic core memory. 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.