Age 9 months :

1. Learn to acclaim
   
   
2. Learn walk or mounting something
   
   
3. Comprehending some words, although cannot saying it
   
   
4. More comprehending of height and sometimes arise to have cold feet as respects to that
   
   
5. Wish to play at close to you but in course they only explore their toy for themselves
   
   
6. Possibility sleep at noon become 2 time in one day