Optical Illusions

This page contains a free variety of different optical illusions, puzzles, and challenges.  The puzzles will be changed on a regular basis, so keep coming to this page for new and fun challenges.

(I only have two puzzles here now, but shortly I'll have many different ones for kids and adults to be challenged by.  Enjoy.)

Try to follow the moving pink dot.  All of the other dots will look pink.  But if you look only at the black + in the center, something very cool happens.  All of the other dots will slowly become green.  And if you keep staring directly at the + in the center, all of the other dots will start to disappear until you can only see one greet dot moving around.