The most powerful pattern for infant stimulation is the human face when it is speaking.
This is where Brightness Discrimination comes into play. Patterns are nothing but organized patches of differences in brightness. Hence, Brightness Discrimination is the major tool for the perception of patterns--and children are born ready to use it!
Those early days (weeks and months and years) when the brain is growing at such a fast rate, are the windows of opportunity to facilitate that growth as much as possible.
And, pattern stimulation is the name of the game. The beauty of it all is that it doesn't cost much! A welfare mother can do as much for her child as a millionairess.
It does, however, require time and commitment. The big gun, for example, is the human face (hopefully mom's or dad's).
Most highly prized by children are three dimensional patterns, rather than two. And the most powerful pattern among those is one that is speaking!