Pink Dot Illusion
Our eyes get exhausted from watching the rotating dots which lead our brains to think the moving dot is green.
We see green is because we have three cones in our brain; red, blue, and green. It takes red and blue to make pink, so that leaves the green cone all alone and so the moving dot appears green when focused on one particular spot.
"25 Superb Optical Illusions For Kids." SloDive. N.p., 13 July 2011. Web. 16 Mar. 2015.
"The Rotating Pink Dots Optical Illusion Explained in Detail." The Rotating Pink Dots Optical Illusion Explained in Detail. N.p., n.d. Web. 18 Mar. 2015.