What developmental milestone is typically observed between 10 to 21 months?

The appropriate developmental milestone typically observed between 10 to 21 months is the ability to scribble spontaneously. During this age range, children begin to improve their fine motor skills, which includes engaging in activities like scribbling. This milestone reflects their growing hand-eye coordination and their exploration of using writing tools to express themselves. Scribbling is an important precursor to later writing skills and creativity, showing how children start to experiment with their ability to make marks on paper. This exploration is a critical step in their cognitive and physical development and represents their curiosity about the environment and the ways they can interact with it.

While other milestones such as walking, developing a pincer grasp, and holding small toys are indeed important in the developmental trajectory of infants and toddlers, they typically occur either slightly earlier or later than the specified age range for spontaneous scribbling. Each of these skills contributes to a child’s overall development but does not specifically align with the highlighted range of 10 to 21 months as clearly as the milestone of spontaneous scribbling does.