Your 6-Month-Old Baby: Milestones & Development (2026)

Six months — the halfway mark of your baby's first year, and what a transformation it's been. The tiny, curled-up newborn who could barely lift their head is now a sitting, babbling, food-eating, opinion-having little person. Six months is one of the most celebrated milestones in pediatric development because so many major skills converge at once: independent sitting, the start of solid foods, the emergence of meaningful social communication, and the physical preparation for crawling.

Six months sits in the middle of a run of fast change, so compare it with five months and seven months, and check how much sleep a six-month-old actually needs if nights have gone backwards since solids started.

6-Month Milestones: The CDC Checklist

The CDC's "Learn the Signs. Act Early." checklist for 6 months lists what most children (75% or more) can do by this age. In the CDC's own categories:

• Social and emotional: knows familiar people; likes to look at herself in a mirror; laughs.
• Language and communication: takes turns making sounds with you; blows "raspberries" (sticks tongue out and blows); makes squealing noises.
• Cognitive: puts things in her mouth to explore them; reaches to grab a toy she wants; closes lips to show she does not want more food.
• Movement and physical: rolls from tummy to back; pushes up with straight arms when on tummy; leans on hands to support herself when sitting.

Notice what is not on the list: sitting unsupported, crawling, and a first tooth are all common around now but not expected of most six-month-olds. Missing one item is not a diagnosis; a pattern of missed items, or losing a skill your baby already had, is the cue to talk to your pediatrician.

Motor Milestones: Sitting Without Support

The defining motor milestone at six months is independent sitting. Your baby can now sit without support for extended periods, using their hands for play rather than propping themselves up. This is a game-changing skill because it frees up both hands for exploration and gives your baby an upright vantage point on the world. Sitting also transforms play: your baby can now manipulate toys on a surface in front of them, bang objects together, and begin to understand spatial relationships. Age-appropriate activity toys that reward pressing, spinning, and manipulating are perfect for this newly seated explorer.

Starting Solid Foods at Six Months

This is the month when solid foods officially enter the picture for most babies. Six months is the usual starting point for complementary foods — the age at which most babies have the oral motor skills and digestive maturity to handle them, and the age our starting solids guide is built around. Starting solids is as much about sensory exploration as nutrition — your baby will smear, squish, spit out, and throw far more food than they eat, and that's perfectly fine. Offer a variety of flavors and textures early: familiarity is what makes a toddler willing to try things later, and the first months of solids are when that familiarity is cheapest to build. Iron-rich foods are especially important because your baby's iron stores from birth begin to deplete around this time. Stock up on bibs — you'll go through several a day once solid foods start in earnest.

Language and Babbling at Six Months

Language takes another significant step forward at six months. Your baby's babbling now includes more consonant sounds and may start sounding remarkably like real speech in its rhythm and intonation — this is called "jargoning," and it's your baby practicing the melody of language even before they have words. They understand more than they can say: most six-month-olds recognize their name, understand "no" (even if they don't comply), and may respond to a few familiar words. Board books become genuinely interactive at this age — your baby can sit and look at the pictures while you name objects, building the vocabulary they'll start using in a few months.

First Teeth and Teething

Many babies get their first teeth around six months, though the timing varies enormously. The bottom front teeth typically appear first. Teething can cause discomfort, increased drooling, and a desire to gnaw on everything. Once teeth appear, gentle cleaning with a soft infant toothbrush and a tiny smear of fluoride toothpaste should begin. Bath time becomes an excellent calming ritual — a safe bath seat lets your baby sit and splash while you handle teeth cleaning and washing without the juggling act.

Getting Ready to Crawl

Crawling preparations intensify at six months. During tummy time, your baby may get up on all fours and rock back and forth — this "rocking on hands and knees" position is the immediate precursor to crawling. Some babies skip this phase entirely and go straight to pulling up on furniture. The important thing is that your baby is developing the bilateral coordination, core strength, and motivation to move toward things they want. As your baby starts spending more time on the floor preparing to crawl, soft-soled shoes or pre-walkers protect their feet while allowing the sensory feedback they need for balance.

Social and Emotional Development

At six months, your baby's social and emotional world is rich and complex. They have strong attachments to their primary caregivers and may show increasing wariness of strangers. They engage in reciprocal play (you roll a ball to them, they push it back), imitate simple actions (clapping, waving), and use vocalizations strategically to get attention. They're also developing a sense of humor: they laugh at unexpected events, enjoy physical play like being bounced or lifted, and may deliberately repeat actions that get a reaction from you. Your baby is not just growing — they're becoming a person.

Gear for this month is simple: soft feeding spoons and a stack of bibs for first foods, sturdy board books, and a bath seat once your baby sits with support. For more depth, see our baby-led weaning guide, baby bibs guide, baby bathtubs guide and, for the rolling-over stage, our safe sleep guide.

Frequently Asked Questions

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