365 mind-bending optical illusions and visual puzzles to expand your mind each day. In 1974 Professor Erno Rubik created an ‘impossible’ object to demonstrate spatial relationships to his architecture students: a cube that could twist and turn but not break. Inspired by his sculptural cube, which went on to become one of the most addictive toys of the 20th century, each day brings an intriguing optical illusion and visual conundrum to ponder. See how you interpret each image and challenge your mind to unpick the impossible. Each day's illusion includes a prompt but doesn't give any solutions.
Size & Additional Information
Tear-off paper desk block, 11cm square sheets
Page-a-day, illustrated in black and white
Undated - start any day you choose
11.5 x 11.5 x 4.8cm boxed