Are they real or imagined? Fifty optical phenomenons will put your visual perception skills to the test. Are they objective or perceived reality? Take the challenge. Solutions included. 50 question and answer cards approx. 4 x 6 inch.
Are they real or imagined? Fifty optical phenomenons will put your visual perception skills to the test. Are they objective or perceived reality? Take the challenge. Solutions included. 50 question and answer cards approx. 4 x 6 inch.
