A wave of nostalgia washes over me when I think about watching The Secret Garden when I was younger. The main character ‘Mary Lennox’ finds a key in a hidden room in the mansion she lives in. I always dreamed of  having a key like that, which could open something I could discover myself, something only I would know about. In this way, props in films are part of the story themselves, part of the escapism, and the magic of cinemas power to submerge you entirely in the story and the characters themselves.