{
  "title": "Child development milestones by age: a reference dataset",
  "url": "https://materlu.com/en/knowledge/studies/developmental-milestones-by-age/",
  "inLanguage": "en",
  "updated": "2026-07-12",
  "tables": [
    {
      "caption": "Typical developmental milestones by age",
      "columns": [
        "Age",
        "Motor",
        "Language",
        "Social-emotional"
      ],
      "rows": [
        [
          "1 year",
          "Pulls to stand, first steps",
          "1–3 words, points",
          "Waves, plays peek-a-boo"
        ],
        [
          "2 years",
          "Walks, runs, climbs",
          "~50+ words, 2-word phrases",
          "Parallel play, growing independence"
        ],
        [
          "3 years",
          "Pedals a trike, draws lines",
          "Short sentences, many questions",
          "Takes turns, shows affection"
        ],
        [
          "4 years",
          "Hops, catches a ball",
          "Tells simple stories, clear speech",
          "Cooperative play, imaginative games"
        ],
        [
          "5 years",
          "Skips, dresses independently",
          "Complex sentences, early literacy",
          "Understands rules, empathy grows"
        ]
      ]
    }
  ],
  "charts": []
}