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Fun Brain Tricks Fun Brain Tricks
Our brains can do amazing things—but in the right circumstances, they can also fool us. Try the brain tricks below and find out what’s going on in the brain in each one.

Scrambled TextScrambled Text What makes the scrambled text in this popular example readable? Can you read it?

Missing LettersMissing Letters How many “f”s are in this block of text? You might be surprised to find out.

The Herrmann GridThe Herrmann Grid Try to count the black dots on this grid. How many do you come up with?

In DepthIn Depth Decide which monster looks larger—and find out why.

Convex or Concave?Convex or Concave? What makes some two-dimensional circles look concave, and others convex?

What Do You See?What Do You See? Different people see different things in this picture. How about you?

Never-Ending ScalesNever-Ending Scales Put on your headphones and listen to this impossible sound pattern.

AutostereogramsAutostereograms How can people see 3D images hidden in a seemingly random pattern?