The National Trust’s Bodiam Castle and creative agency Splash and Ripple have collaborated on a new interactive experience. The experience, which takes the form of an interactive murder mystery, uses devices called ‘Echo Horns’ carried by the visitors to tell the story of the mystery, as well as educate visitors on historical events. The Echo Horns carry a Raspberry Pi and some RFID wizardry and allow visitors to choose their own story by following clues. You can read more about the project over on the Raspberry Pi Foundation blog.