Child able to make tower of 5-6 cubes at which age?
**Core Concept**
The question is testing the developmental milestone of fine motor skills and hand-eye coordination in children, specifically the ability to stack and balance cubes. This is a key aspect of the Denver Developmental Screening Test (DDST) and the Bayley Scales of Infant and Toddler Development (Bayley-III).
**Why the Correct Answer is Right**
The ability to make a tower of 5-6 cubes is a significant milestone in child development, indicating the maturation of fine motor skills, hand-eye coordination, and problem-solving abilities. This skill is typically achieved around 3-4 years of age, as it requires the child to develop the ability to grasp, manipulate, and balance small objects. The corticospinal tract, which is responsible for motor coordination, and the cerebellum, which is involved in fine motor control, play crucial roles in this development.
**Why Each Wrong Option is Incorrect**
**Option A:** This is too early, as children typically start to show interest in stacking objects around 18-24 months of age but lack the fine motor skills to achieve a tower of 5-6 cubes.
**Option B:** This is too late, as children usually master this skill before the age of 5.
**Option C:** This is incorrect as the age is not specified within the typical range of child development.
**Clinical Pearl / High-Yield Fact**
Remember that developmental milestones are crucial in pediatric assessment, and delays or abnormalities in these milestones can indicate underlying developmental or neurological disorders.
**Correct Answer: C. 3-4 years.**