My son is the second child. I find he is very bright though he is only one month to two years. First, He can learn english words and songs more quickly than his elder sister.  I did not teach him any enlish words. He just heard when i taught his sister. He knew thank you. hello. NO,NO.NO 

good night. and he can sing some sentences about english songs, For example, For the song, the wheel on the bus, he had got "round and round,  open and shut  beep beep . all throught the town" Sometimes will give you big surprise.

On the other hand, he can have the jelly with his own ways. when you give him a jelly, he will bite its bottom and then it will open automatically.

Last time, when I give them 3 jellies respectively. then he had eat up all but his sister did not open one and ask me for help. But her brother is claiming more from his sister. I had thought he had through away. When I give him another, then I got his opening ways. Now his sister can also open it in that way. Many little things happened in my daily life. I am wondering if he is a boy so he will have more creative ways.

Next, He will help me do some little housework. then he will ask for your encouragement and hug.

I am wondering if this happened in your family.