50 Optical Illusions Activity Cards(50)(Usborne Activity Car

A set of 50 of the most amazing optical illusions ever created. Each card has a mind-boggling illusion on one side and an explanation of how it works on the other. Includes a "revealer" card to help check colours and take measurements to show that seeing really is believing. Review: 'You can always rely on Usborne to come up with ideas for entertaining children and their packs of Usborne Activity glossy wipe-clean cards...are a brilliant idea' - Newbury Weekly News Author Biography: Sam Taplin grew up in a beautiful valley in Yorkshire, where he dreamed of being a writer, and after three years reading other people's books at university he started writing his own for Usborne. He's been doing it ever since. When he's not writing about lonely rabbits or inquisitive bears, he likes doing card tricks, writing songs and playing long games of chess by the fire.