Fifty ways to trick your brain. This compact card set contains 50 surprising and varied optical illusions, from color perception challenges and line tricks to checkerboard patterns that refuse to behave. Each card poses a question and includes an explanation on the back, making it as satisfying to understand as it is baffling to look at. A great conversation starter, a genuinely fun thing to pass around a table, and a quiet reminder that the eyes cannot always be trusted. Makes a wonderful stocking stuffer or party favor.

• 50 cards 
• Paper and cardboard 
• Made in France
• 3.93" x 3.14" 
• Ages 5+