Professor Horatio Pendulum's Chronosphere has overloaded again, and history is leaking into the City of London's hidden gardens. A Franciscan monk is hunting for the roof of his church, a Roman legionary turns up every time somebody says 'Roman wall', and two wooden giants are bickering outside the Guildhall.

Become a Time Hunter and help Dan and Bex solve nine riddles, from Christchurch Greyfriars to the Guildhall, meeting Sir Rowland Hill, the everyday heroes of Postman's Park, the Goldsmiths' golden leopards, the ghosts of Cripplegate, Shakespeare's fellow players at St Mary Aldermanbury and Gog and Magog along the way.

This free family audio walk from Fun Kids pairs with a printable Time Hunter map and handbook for a real 2 to 2.5 hour adventure around the City of London. Download yours at funkidslive.com and start hunting.