I would like to find out what he illusion is on cuties 5717573 it is 2 triangles and 3 balls. I am making books for a toy drive and I don't know how to word it.

OptiTriangle

Hi Ann, Is this the one you are talking about? This is a reversing optical illusion where you vision shifts from seeing the two different triangles, one that is more defined and one that is not defined at all. I digitized those hoping to make some fun designs for the older guys. Jan