Now your child can act out the role of their favourite book character from best selling children's author and comedian, David Walliams. This official Kids Ratburger Costume is perfect for comical dress up and as a kid's World Book Day costume. The sauce bottle prop even comes with a sound chip that 'squeaks and hisses' - hours of fun. Your little one will be using their imagination at school to serve up delicious Ratburgers now they're dressed as Burt, so let them show off their new costume and take the book and it's adventures into class!