Probably you've seen this around the net before, if you haven't I'll explain.
Looking at the picture, chances are you're seeing a couple (man and woman) in an intimate embrace.
But a young child - say, under 10 years old, will probably see a bunch of Dolphins. Look close, closer now, you can see them too....
The point of it is this: A child has no references (or most children have no references) for a couple in a similar pose, and so see the dolphins. As they get older, however, their points of reference change until they see the couple as the primary picture and the dolphins just disappear.
Which is curious, and makes one think: What pictures or patterns might exist around us, that we can't see or recognize because we haven't the perceptual frames of reference? It's hard to say, but it seems foolish to presume that because we can't see or recognize them that they're not there...
Undoubtedly there are entire layers and hierarchies of order and patterns that we can't recognize merely because we haven't the appropriate frames of reference or body of experience. How then can we imagine them?