Youtube is youtube kids. The first one really have a curiosity to learn and explore. We were really surprised he got the idea of how to count almost unlimited n

Youtube is youtube kids. The first one really have a curiosity to learn and explore. We were really surprised he got the idea of how to count almost unlimited numbers. We only taught him it just repeats and changes name once you reach the end of tens. He was also able to do arithmetic just by watching number blocks and learned multiplication by 3 yrs old just by explaining to him the concept of addition, subtraction and multiplication. The other guy is totally different he can memorize songs and retell stories on a book (he can't read) told to him. He likes to be babied don't even try to touch the remote for fear of losing what he is watching. They are both intelligent it just that the other guy is not interested in exploring by himself. I think language development was the key to early development because they could understand what you are explaining to them.