Which characteristic is not a feature associated with children with Down syndrome?

High intelligence is not typically associated with children who have Down syndrome. While individuals with Down syndrome can demonstrate a wide range of intellectual abilities, the majority tend to have mild to moderate intellectual disabilities. This is important to recognize, as it challenges the stereotype that all children with Down syndrome fall within a specific intellectual range.

In contrast, characteristics such as short, thick necks, small heads, and flat facial features are well-documented traits associated with Down syndrome. These physical features are part of the distinct phenotypic profile of the condition and are often used in the diagnostic process. Recognizing these traits can help in providing appropriate support and understanding of the developmental paths of children with Down syndrome.