Gary Stein | October 7, 2011 , ClickZ.
As I understand it, human children learn to count at or near the age of two (not sure when non-human children start to count; will look into that for a future column).
The interesting thing is that they tend to count only to two for a number of months. It's not so much that they don't know the number three, but rather that they aren't instead of counting, they are simply distinguishing between one object and many objects. "Two" doesn't mean two nearly as it just means "more than one." This is just a transitional phase and they quickly start to count everything. Most kids grow out of this phase and simply count the things that are important to them.
Some, however, become interactive marketing professionals and never, ever get tired of counting anything and everything that could possibly be counted no matter what that number could mean...... Read more.