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. Book informationShow less Age6+Key StageKS1 A/DTBox of cardsISBN: 9781409507796Extent: 50 cardsDimensions: 154 x 98mmAuthor/EditorSam Taplin