The Children's Book Week Poster for 2011 features art by author/illustrator Peter Brown with characters from his book Children Make Terrible Pets. I have blogged about the posters before, but you can have one sent to you from the Children's Book Council and show your support for Book Week or start your very own collection. They simply require a self addressed envelope with 65cents postage and your poster will be on the way.
The Children's Book Council site provides all the information!