ABC Song

I have been singing to Joven ABC as long as I can remembered when he is born. Since he is able to talk more I tried to get him to sing song, but he nevers wanted to try and doesn't seem quite keen.
But one night or very early in morning, when he is 2 and half yr-old, he started singing ABC song from A to Z without my help/interference at all. So he does remembered and memorized it inside their brain. I can see that he is not someone who willing to display or do it until he is very sure of it. Not sure is this a good sign or a worried sign, cos as a parent I am sometimes so eager of seeing results. And like to see him constant practise things he is not sure at least I can see his progress. But he seem wanted his own ways of learning - passive mode. So I really don't know what he is absorbing.

Just like when he is a baby, same for learning his baby walk, he won't want us to hold his hands. He rather practice walking along the wall, when no wall to hold on he will do his "commando" crawling to the next wall. And when he started walking on his own... his steps are stable. He don't have the normal baby unbalancing walk whether can they make another steps forward or not.

Now Joven is 3 and half yr old, he is still like that refusing to try & practise.... like writing & drawing. I think I just have to keep inputing him with information, hopefully he will surprise me eventually.