Which milestone is typically not achieved by 12 months?

At 12 months of age, children typically demonstrate a range of developmental milestones, but successfully throwing a ball is not usually one of them. By this age, infants are often crawling, pulling themselves up to stand, and walking with assistance, indicating significant progress in their gross motor skills. They also begin to engage in activities that develop their fine motor skills, such as picking up small objects and possibly starting to stack blocks.

While children may experiment with throwing objects, their coordination and control are still developing, which means they may not consistently throw a ball in a controlled manner until they are closer to 15-18 months old. Developing the ability to throw a ball accurately requires more refined motor skills, which occurs as children grow and practice these motions.

In contrast, building a two-block tower is generally achievable for children around 14-15 months, while walking with assistance and crawling are expected by 12 months, as they continue to develop their motor skills. Understanding these developmental timelines can help caregivers and healthcare providers recognize typical growth patterns and identify when intervention may be necessary.