Which developmental milestone typically occurs around the age of 6?

The developmental milestone of losing primary teeth typically occurs around the age of 6, marking an important transition in a child's growth. This process often begins with the lower central incisors, followed by the upper central incisors, and signifies the child’s progression from early childhood into the later stages of development.

Losing primary teeth is not only a physical change but also indicates that the child is developing both physically and cognitively as they prepare to take on more complex tasks. This milestone coincides with other developmental changes, such as increased social interactions and cognitive skills, as children often begin to understand the implications of losing teeth, such as the tradition of the tooth fairy.

In contrast, walking independently is usually established earlier, generally around 12 months of age. Starting primary education often occurs at age 5 or 6, but it doesn't align directly with the physical development milestone of losing teeth. Forming complex sentences is also a skill typically developed before age 6, as children are usually able to construct more straightforward sentences by age 3 and progress to more complex forms by age 5. Thus, the loss of primary teeth is the most accurate milestone associated with age 6.