Six Months

Social and Emotional

• Knows familiar faces and begins to know if someone is a stranger
• Likes to play with others, especially parents
• Responds to other people’s emotions and often seems happy
• Likes to look at self in a mirror

Language/Communication

• Responds to sounds by making sounds
• Strings vowels together when babbling (“ah,” “eh,” “oh”) and likes taking turns with parent while making sounds
• Responds to own name
• Makes sounds to show joy and displeasure
• Begins to say consonant sounds (jabbering with “m,” “b”)

Cognitive (learning, thinking, problem-solving)

• Looks around at things nearby
• Brings things to mouth
• Shows curiosity about things and tries to get things that are out of reach
• Begins to pass things from one hand to the other

Movement/Physical Development

• Rolls over in both directions (front to back, back to front)
• Begins to sit without support
• When standing, supports weight on legs and might bounce
• Rocks back and forth, sometimes crawling backward before moving forward

Source: https://www.cdc.gov/ncbddd/actearly/milestones/milestones-6mo.html