'There's no such thing as a Gruffalo,' or is there? Your little one can become their favourite book character in our adorable cuddly brown all-in-one costume this World Book Day. It features the mouse from the story along with pictures of the Gruffalo on the front and the back has the famous purple spikes on it. The hood forms the Gruffalo's head and the arms and feet have claws on them. It also comes with a removable tail. Please note that for dress up styles under 3 years the appearance and features may vary due to safety reasons. Bringing books to life.