developmental Developmental Milesstones- three months to five years Sometimes it’s not enough to define what something is; we also need to explain what it’s not. This is certainly true of gifted children. It’s just not always enough to explain what it means to be a gifted child; we also need to explain what a gifted child is not. In other words, parents of gifted children need to be aware of the developmental milestones of average children to understand the advanced development of their gifted children. Here is a list of some basic developmental milestones from ages three months to five years. Although most children will reach these milestones at approximately the time noted, there is considerable variation, with some children reaching them a little earlier and some children reaching them a little later. Gifted children, however, tend to reach several milestones weeks, months, and even years earlier than average children.