By 18 months, which combination of motor abilities is typical?

• A. Walks independently; runs; builds a short block tower (2–3 blocks)
• B. Walks with assistance only
• C. Sits and crawls alternately
• D. Hops on one foot

Answer: (A)

At about 18 months, kids typically have moved to walking independently and may start running, while also showing emerging fine motor skills like stacking a small tower of blocks (around 2–3 blocks). This combination—independent walking, the ability to run, and the capacity to build a short block tower—fits what many children do at this age because they’re gaining both mobility and hand–eye coordination.

Walking with assistance indicates not yet independent walking. Sits and crawls alternately suggests slower or inconsistent progression in gross motor skills. Hopping on one foot is a later milestone, usually seen well after 18 months.