Colouring in can free your mind. Let’s learn how to play again | Philippa Perry

It’s cheering that a colouring book for adults is topping bestseller lists, because as we get older it’s easy to forget about the joy – and learning potential – of playAs George Bernard Shaw once said: “We don’t stop playing because we grow old; we grow old because we stop playing.”Secret Garden, a book by Johanna Basford, has sold more than 1.4m copies and hit the top of Amazon’s bestseller list this month. What is it? Ninety-six pages of black-and-white drawings of flowers, lea