Mind-bending and hypnotic, optical illusions fascinate and astonish. This calendar features 12 striking illusions that boggle the brain and trick the eye, from moving patterns to image paradoxes. Fun and engaging for adults and children alike, this vibrant calendar is sure to be a hit with curious minds of any age. The date pad features previous and next month’s views. Printed on FSC-certified paper, with plastic-free packaging.