Once a year, I run a workshop for anyone who would like to learn how to find invisible portals into other worlds. It's my favourite bit of kit, of all the many exercises I've been sharing over the years, and I cannot tell you how magical it is. If you're in London and free Saturday afternoon, come and play. You can buy your tickets here: https://www.eventbrite.co.uk/e/wonder-walk-tickets-46076868153