A young bored boy and his cabbage obsessed grandma decide to join hands and steal the crown jewels after the boy discovers that granny used to be a jewel thief. Your young David Walliams book fan will love our amazing 'Gangsta Granny' costume. It comes complete with a wig, dress, and eye mask to help them get into character. At Tu, we have a variety of great fancy dress ideas for little bookworms. Please note that for dress up styles under 3 years the appearance and features may vary due to safety reasons. Bringing books to life.