Watching a baby grow is a fascinating and unique experience for the parents. A child's growth is a complex and continuous process. They should be able to do certain things at certain ages. These are called developmental milestones. As a parent, it is important to realize that no two children develop at the same rate. It is, therefore, futile to worry that the child next door can do this and that, while ones own child cannot. At the ages noted for different activities, the child should be observed for some time.
2 months - social smile
4 months - holding neck
8 months - sitting without support
12 months -