From birth to the first day of school
Sixteen stages. Months at the start, half-years later on, because that is how children actually change.
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- 0–1M
0-1 month
Newborn
Feed, sleep, survive. That is the whole job.
Nothing needs to be taught this month. Your baby is adjusting to life outside the womb and you are adjusting to a new identity. Whether things are going well comes down to three things: enough milk in, enough output, and weight heading back up.
How much sleep · 14-17 hours a day2 vaccines8 milestones - 1–2M
1-2 months
First smile
The first real smile shows up in this window
Your baby starts being present: looking at you, turning towards your voice. This is also peak crying, often called the colic period, which builds to around six weeks and then eases on its own.
How much sleep · 14-17 hours a day1 vaccines8 milestones - 2–4M
2-4 months
Smiling and grabbing
Reflexes give way to intention
These two months are a genuine shift. Hands stop being reflexive fists and start reaching on purpose. Smiles stop being accidental and start being answers. Many families also meet the four-month sleep change here.
How much sleep · 12-16 hours a day5 vaccines12 milestones - 4–6M
4-6 months
Getting ready to eat
Two months of preparing for the first real meal
Sitting, grabbing, and putting everything in the mouth are all physical preparation for solid food. Your preparation is deciding what the first bite will be, and how you will know they are actually ready.
How much sleep · 12-16 hours a day3 vaccines12 milestones - 6–8M
6-8 months
Starting solids
The first real meal, and the mess that comes with it
Solids begin. The goal for these two months is not how much goes in, but getting used to spoons, flavours and textures. Milk is still the main meal; food is practice.
How much sleep · 12-16 hours a day3 vaccines12 milestones - 8–10M
8-10 months
Crawling and pinching
They can move now. Your home is no longer safe.
Mobility arrives, and with it both a wider world and a wider set of hazards. Fingers get precise enough to pick up a single grain of rice, which means anything on the floor ends up in the mouth.
How much sleep · 12-15 hours a day2 vaccines12 milestones - 10–12M
10-12 months
Almost walking
First step, first word, first birthday
Three milestones crowd together at the one-year mark: walking, a first meaningful word, and a diet that shifts from milk-led to food-led. Do not rush the walking — the normal range runs to 18 months.
How much sleep · 11-14 hours a day0 vaccines12 milestones - 12–15M
12-15 months
Walking
They can walk now, and they have learned the word no
Independence arrives alongside mobility. They have opinions and no way to express them, and that gap is where the first wave of meltdowns comes from.
How much sleep · 11-14 hours a day2 vaccines12 milestones - 15–18M
15-18 months
Before the word burst
They understand far more than they can say
Comprehension runs well ahead of speech, and that gap explains most of the frustration at this age. A vocabulary explosion is close, usually between 18 and 24 months, taking them from dozens of words to hundreds.
How much sleep · 11-14 hours a day0 vaccines12 milestones - 18–24M
18-24 months
Word explosion
Six months that take them from dozens of words to hundreds
The turning point for language. It is also the start of the terrible twos, because the gap between what they want and what they can control is at its widest. These are the same phenomenon.
How much sleep · 11-14 hours a day3 vaccines13 milestones - 24–30M
2 to 2.5 years
I do it myself
Everything must be done alone, and nothing can be done well
Peak autonomy. They want to put on their own shoes, pour their own water, press the lift button, and fall apart when they cannot. What helps most here is not teaching but leaving enough time.
How much sleep · 11-14 hours a day1 vaccines14 milestones - 30–36M
2.5 to 3 years
Reasoning starts
Words start replacing meltdowns
Language finally catches up with intent and the frequency of collapse drops noticeably. They can say "I do not like it" instead of lying on the floor. These six months are also the run-up to preschool.
How much sleep · 10-13 hours a day0 vaccines16 milestones - 36–42M
3 to 3.5 years
Starting preschool
The first world that does not contain you
Most children start preschool here. Social rules, a group schedule and self-care all arrive at once, and a visible period of regression — clingier, more tearful — is normal.
How much sleep · 10-13 hours a day1 vaccines13 milestones - 42–48M
3.5 to 4 years
Rules and imagination
They can tell stories, and also make them up
Imagination is in full flower while rules and consequences start to make sense. Most "lying" at this age is not a moral failing but a blurred line between imagining and remembering.
How much sleep · 10-13 hours a day0 vaccines16 milestones - 48–60M
4 to 5 years
Friends and self-control
They start genuinely caring what other children think
Peer relationships become the centre of life and emotional regulation improves markedly. This is also where school readiness starts, and attention, self-control and expression matter far more than how many characters they can read.
How much sleep · 10-13 hours a day2 vaccines16 milestones - 60–72M
5 to 6 years
The last preschool year
Most of what prepares them for school is not in a book
The final year before school. Self-control, attention span and abstract thinking are all developing fast. The best investment this year is habits and self-management, not getting ahead academically.
How much sleep · 9-12 hours a day0 vaccines16 milestones