I will never forget this one day when Kevin was a preschooler. We had an IEP meeting, and one of his proposed goals was to be able to visualize and identify what 2 of something looks like, or what 3 of something looks like.
That same day, my younger son came up to me with two baby blankets, one in each hand, and said, “Look, mommy! TWO blankies!” Ouch. He’s two and a half years younger and he already had the skills that his brother lacked; a beginning math skill.