This bit of educational theatrical fun sounds awesome! Via.

Travelling from past to future through a landscape of machines and ideas Walk the Plank and Thingumajig Theatre have created an interactive journey through the courtyard of Manchester’s Town Hall. The audience will help inventor and mathematician Charles Babbage find the clues to repair his Difference Engine; solve the spider’s riddles, hidden in the worldwide web; persuade the counting madman to open the gates to the Hall of Shadows…and discover the secret workings of the steampunk arcade. —The Manchester International Festival