Baby 4–6 months

4 Month Old Baby

Around four months

What this month often looks like

Around this age many babies smile to get attention and make sounds back when you talk.
Some hold their head steady and push up on their elbows during tummy time.
Many bring their hands to their mouth.

Head steadiness is still being practised rather than finished — steadier in some holds than others, and steadier at the start of the day than the end.
Hands may come together in front of the chest, which usually comes before reaching accurately for anything.
Swiping toward something nearby may appear before grasping it — the arm arrives first, the hand catches up later.
Cooing may widen into chuckles and more varied sounds during play.
Turning toward a familiar voice may become more consistent, especially yours.
Attention is stretching: a face or a toy may hold interest for noticeably longer than it did a month ago.
Around four months many babies hold their head steady without support when held upright, and may push up on their elbows when lying on their front.
Bringing hands to the mouth and looking at their own hands are common around this age.

Short spells of supervised play on their front, while awake, give the shoulders something to work against.
A light toy placed just within comfortable reach invites the arm to try. Let them lose interest when they do.
Copying the sounds they make, then waiting, teaches the shape of conversation before words exist.
Floor time on a firm, flat surface gives room to practise pushing up without being propped.

You may feel more confident some days and still unsure on others.
That mix is common.
Small preferences are becoming visible — a hold, a room, a time of day that tends to go better.
Play is short at this age. A few engaged minutes is a full session.
Four months is often when the outside world starts asking what your baby can do. There is no schedule to keep up with.
An anchor age is a description of many babies, not a deadline for yours.

Following your baby's cues at their own pace is enough.

36 activity ideas suit this age — most take about five minutes and need nothing you do not already have.

Services ParentSide defines for this stage. Each page explains what the service covers and which professionals are approved to provide it.

Sources

If you are worried about your wellbeing or your baby's wellbeing, consider contacting a qualified health professional.