In caves and cupboards the world over, there are monsters – monsters who are curious about humans and would love to hear from them. Meanwhile, there are many young people who’d love to write to them. So we helped the Ministry of Stories launch the Hoxton Street Monster Supplies Postal Service. For a small fee, humans of all ages can write to a monster and receive a personal reply, with all proceeds going toward the Ministry’s creative writing workshops. We created six monster personas, plus guidelines and a training workshop that enabled an army of volunteers to write on the monsters’ behalf.