The second six months of the first year are when babies become physical. They sit, they roll, they crawl in some idiosyncratic way of their own invention, they pull themselves up the sofa, and by the first birthday many are taking their first wobbly steps. They also start to communicate — pointing, babbling, finally producing something that sounds like a word — and to develop very clear opinions about which adults are theirs. Healthbooq tracks the milestones month by month and points to the few patterns worth raising at the eight- and twelve-month checks.
Sitting, Rolling, Crawling, Standing
By six months most babies have steady head control and can sit propped up. Sitting independently — hands free for play, no toppling sideways — usually arrives between six and eight months. The hip and trunk muscles needed for this come from rolling and tummy time in the earlier months.
Mobility shows up in surprising forms. The textbook hands-and-knees crawl is one option among many. Some babies bottom-shuffle for months. Others commando-crawl on their belly, roll across the room, or skip crawling and pull straight to standing. The form does not matter; the function does. By nine or ten months almost all babies have some way of getting from A to B without being carried. If a baby has none by ten months, mention it.
Pulling to stand on furniture comes in around nine to twelve months. Cruising — walking sideways holding the sofa — follows. First independent steps land somewhere between eleven and fifteen months for most children, with eighteen months being the upper end of the typical range; not walking by eighteen months is the cut-off for a referral.
A note on equipment: baby walkers (the kind you sit in with wheels) are associated with delayed walking and ten thousand A&E visits a year in the UK. Most paediatric guidelines now recommend against them. Push-along walking trolleys, which the baby pushes from behind, are a different thing and are fine.
From Babbling to a First Word
Babbling — repetitive consonant-vowel combinations like ba-ba, da-da, ma-ma — gets going between six and eight months. By eight or nine months babies start adding intonation: long strings of sound that rise and fall as if asking and answering questions. This is sometimes called jargon and can sound exactly like a foreign language. By ten or twelve months the sound repertoire narrows to the phonemes of the language they hear daily.
Most babies produce a first recognisable word — used consistently with meaning, not just by accident — somewhere around twelve months. Anything between ten and fifteen months is typical, and some babies who walk early talk a bit later, and vice versa. "Dada" is often credited as a first word and is sometimes a real one and sometimes wishful interpretation.
By twelve months most babies respond reliably to their own name, understand a handful of simple words ("no", "bye-bye", "more", their own name, names of pets), and communicate by pointing, reaching, and waving. Pointing is the milestone that matters most: pointing to share interest ("look at that dog!") is one of the strongest early indicators of social communication. Babies who do not point by twelve months and do not start by fifteen are worth a conversation with the health visitor.
Object Permanence and Why Peekaboo Is Funny
At six months, when a toy disappears behind a cushion, it might as well not exist. By eight or nine months, most babies will lift the cushion to find it — they have understood that things continue to exist out of sight. This is object permanence, and it is the punchline of peekaboo: the baby suddenly knows you are still there even when your hands are over your face, which makes the reveal funny.
The same understanding has a less convenient side. Once babies grasp that you continue to exist when you leave the room, your absence becomes a thing rather than a fact, and separation anxiety appears. This usually peaks between eight and eighteen months and is a marker of secure attachment, not a sign anything is wrong.
Cause and Effect, Played Hard
The baby who at four months accidentally kicked the mobile and made it move now deliberately drops a spoon from the high chair fifteen times in a row. This is not (only) winding you up. It is systematic experimentation: same action, slightly different angle, what happens? Cause-and-effect toys (jack-in-the-box, sound buttons, anything that does something predictable) are gold at this age.
Stranger Anxiety and Social Referencing
Stranger anxiety — bursting into tears when an unfamiliar adult tries to hold them — kicks in for many babies between six and nine months. It is awkward at family gatherings and is also a healthy sign: the baby can now distinguish their primary attachments from everyone else.
Around eight to ten months, social referencing appears. At the top of a step, or faced with a new object, the baby looks at your face to work out what to do. If you look calm, they carry on. If you look worried, they freeze and often cry. This is why how you react when they fall matters more than the fall itself; a quick, neutral "you're alright, up you get" tends to produce less crying than a panicked rush.
Sleep, Feeding and Other Practical Things
Sleep tends to consolidate across this period. By twelve months most babies sleep eleven to twelve hours overnight (with a wake or two) and have one or two daytime naps totalling two to three hours. Sleep regressions around eight to ten months and again at twelve months are common and pass within a few weeks.
Solids should be well established by six months in most cases — current UK guidance is to introduce them at six months alongside continued milk feeds. By around nine months babies can manage finger foods, including soft chunks; the gag reflex sits closer to the front of the mouth than in adults and gagging is part of safe learning, not the same as choking. Iron-rich foods become important from six months as iron stores from pregnancy are mostly depleted.
What to Mention at the Twelve-Month Check
The patterns worth raising:
- Not babbling at all
- Not responding to their own name
- No pointing, waving, or reaching to be picked up
- Not sitting independently
- No way of moving across a room
- Very little eye contact, or eye contact that has reduced compared to a few months before
- Lost a skill that was previously there
These are flags, not diagnoses. Most babies who pick up a flag turn out to be fine — speech delays often resolve, motor delays often catch up — but the small number who need extra support do better with earlier input. The first investigation is usually a hearing test.
Key Takeaways
From six to twelve months a baby goes from sitting up to chasing you across the floor, from cooing to babbling something that sounds disturbingly like 'mama', and from being calm with anyone to crying when grandma picks them up. The range of normal timing is wide; what matters most is forward movement on each milestone.
