Can your eyes deceive you? Try these amazing optical illusions to find out. Look hard, then look again to see... ● spinning patterns—but the page isn't moving! ● colors that change—but do they? ● big and small shapes—spot the difference! Devised by an expert on brain training, these visual tricks and challenges are huge fun and quite an eye-opener! There are handy tips if you need help, plus an answer key at the back!