It's kind of interesting to see how different children develop in different ways and times. For example, my brother didn't really grasp reading until age 12, while I had asked my parents to teach me at the age of 4 and was avidly reading full books by 6. And, yet, my brother is the one who has perfect pitch and a mechanical aptitude that I could only hope to achieve with great effort. I love the differences like that - it makes everybody so special and unique.