Which milestone is usually achieved by a 15-month-old infant?

• A. Walks alone.
• B. Puts three words together.
• C. Feeds self well with spoon.
• D. Builds tower of seven cubes.

Answer: (A)

At 15 months, the big developmental milestone most kids have started to achieve is walking without help. By this age, many infants have progressed from toddling with support to taking independent steps, which is a hallmark of the transition from infancy into the toddler years.

The other options reflect skills that generally appear a bit later. Phrases of three words typically emerge closer to 2 years or beyond, as vocabulary expands and children begin combining words. Coordinated self-feeding with a spoon becomes more refined around 2 years, not usually at 15 months. Building a tower of seven cubes is a fine motor milestone that usually appears in the second or third year, when children can manipulate more blocks and plan simple construction.