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Difficulty: EasyNormal Growth and Development

Match the following developmental milestone clusters with the age at which a typically developing child is expected to achieve them.

  • Social smile, coos, lifts head and chest while prone2 months
  • Uses a mature pincer grasp, walks independently, says first words other than 'mama' and 'dada'12 months
  • Kicks a ball, builds a tower of 6 cubes, speaks in 2-word phrases24 months (2 years)
  • Rides a tricycle, copies a circle, speaks in 3-word sentences36 months (3 years)

Answer

The correct matches align the milestone clusters to their corresponding ages: Social smile (2 months), Mature pincer grasp and walking (12 months), Kicking a ball and 2-word phrases (24 months), and Riding a tricycle and copying a circle (36 months).
Each age corresponds precisely to the onset of the listed gross motor, fine motor, language, and social developmental milestones according to standard pediatric growth guidelines.

Step-by-Step Solution

1
Evaluate the first cluster of milestones (social smile, coos, lifting head).
Identified as 2-month milestones.
These are the hallmark early social, language, and gross motor achievements expected at 2 months of age.
2
Evaluate the second cluster of milestones (mature pincer grasp, walking, first words).
Identified as 12-month milestones.
Independent walking and the transition to a mature pincer grasp are classic markers of a 1-year-old child.
3
Evaluate the third cluster of milestones (kicking a ball, 6-cube tower, 2-word phrases).
Identified as 24-month milestones.
The rule of twos applies here: 2 years old correlates with 2-word phrases and 2/2 (half) of speech being intelligible.
4
Evaluate the fourth cluster of milestones (riding a tricycle, copying a circle, 3-word sentences).
Identified as 36-month milestones.
The rule of threes applies here: 3 years old correlates with a 3-wheel tricycle, 3-word sentences, and 3/4 of speech being intelligible.

Key Concept

Normal pediatric growth and developmental milestones
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Topics

Normal Growth and Development

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