Why do some printed pictures appear to swirl madly in front of your eyes? How can two colours that look completely different actually be the same? What makes complete images suddenly arise out of random patterns? With this crazy book of optical illusions, astound your eyes and amaze your brain and discover the science of how the illusions work. With help from neuroscientist Anil Seth, author Clive Gifford has written a fun and accessible book that introduces kids to the neuroscience behind how our brains and our eyes interact, creating these amazing phenomena. Children will be enthralled by the illusions and engaged by the supporting information. Learning and critical thinking are encouraged, as readers come away wondering: can you ever believe what you see? Shortlisted for the Royal Society Young People's Book Prize 2014.