Optical Illusion

We are just preparing for our final holiday camp for children. One of the fun things we are doing in the camps is learning about vision and how that sometimes all that we see isn't what it seems. We show the children some simple tricks, that they can learn, and we use some old trusted optical illusions that play tricks on the eyes by using different perspectives, colours and shapes. But there are also some new optical illusions that are better when seen on the computer screen - the flower petals are not actually moving!