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What should a 4-month-old be doing?
At 4 months many babies roll from tummy to back, laugh out loud, babble (ba, ma, da), reach for toys, and hold their head steady. This is also when the famous 4-month sleep regression often hits. Here is what is typical at 4 months across sleep, feeding, movement and sounds, plus the few signs worth a pediatrician chat.
Four months is when your baby gets loud and busy: belly laughs, squeals, and hands that grab everything on the way to the mouth. It is also when many babies suddenly start waking more at night, the famous four-month shift. This page covers what is typical now, what helps with sleep and play, and the questions parents ask most.
Age: 4 months.
Most children at this age: roll from tummy to back, laugh and babble, reach for and grab toys, and hold their head steady.
Common concerns this month: the 4-month sleep regression and more night waking, short naps, drooling and teething, distracted feeding. Most are a normal part of this stage.
Typical sleep: 12 to 16 hours a day, with the 4-month regression often disrupting nights for a few weeks.
This month in real life
Not milestones, just what this age often feels like day to day.
- are suddenly waking more at night, the 4-month sleep shift
- laugh out loud and squeal
- grab everything and bring it to their mouth
- may start drooling and chewing as teething nears
✨ What's changing now
The shifts most families notice this month.
- Rolling from tummy to back
- Laughing out loud and babbling (ba, ma, da)
- Reaching for and grabbing whatever's near
- The 4-month sleep regression often lands here
- Drool and chewing as teething may begin
Sleep at 4 months
The 4-month regression is a permanent change, not a step backward. Routine and wake windows help.
- About 12–16 hours of sleep a day
- Longer 6–8 hour night stretches becoming possible
- 3–4 naps a day, often short
- The 4-month regression is normal, sleep cycles mature for good
- A consistent bedtime routine helps now
Feeding at 4 months
Solids start around 6 months, not before 4. Milk is still the main food.
- Breastfed: about 6–10 feeds a day
- Formula: about 24–32 oz (700–950 ml) a day
- Shows interest in your food but isn't ready for solids yet
- May feed less efficiently when distracted
- Wait for 6 months and readiness signs before starting solids
Development
- Holds head steady without support
- Rolls from tummy to back (around 4 months)
- Pushes up on arms during tummy time
- Reaches for and grasps toys with both hands
- Brings objects to mouth to explore
- Tracks moving objects with the eyes
- Recognises familiar people at a distance
- Babbles with consonant sounds (ba, ma, da)
- Makes sounds back when you talk
- Laughs and squeals
- Responds to different tones of voice
- Smiles spontaneously, especially at people
- Enjoys playing and may cry when play stops
- Copies some movements and expressions
- Looks for you across the room
radio_button_checked Right now
- Rolling tummy to back
- Laughing and babbling (ba, ma, da)
- Reaching for and grabbing toys
schedule Coming soon
- Rolling both ways
- Sitting with support
- Responding to their own name
Useful tools for this age
Free calculators that fit this stage.
Stories for this age
Gentle stories where your child is the hero and Grow the friend.
Many parents wonder…
If you landed here because of one of these, you're in the right place. These are common at this age and usually part of normal development.
🎯 Play & activities
target Focus: Rolling, laughing & babbling
Age-matched activities from KidyGrow's developmental library.
When to talk to your pediatrician
Most variation is normal. Reasons to ask, not reasons to panic.
- Can't hold the head steady by 4 months
- Doesn't smile at people
- Doesn't babble or make sounds back
- Doesn't watch things as they move or follow with the eyes
- Doesn't bring hands to mouth
- Very stiff or very floppy muscles
Browse by age
- CDC Developmental Milestones
- AAP Bright Futures
- WHO Child Development Guidance
Frequently asked
- What should a 4-month-old be doing?
- Many roll tummy to back, laugh, babble (ba, ma, da), reach for and grab toys, and hold their head steady. Wide ranges are normal.
- What is the 4-month sleep regression?
- Around 4 months a baby's sleep cycles mature permanently, so they wake more between cycles. It's normal, and routine plus age-appropriate wake windows help.
- How much should a 4-month-old sleep?
- About 12–16 hours a day across night sleep and 3–4 naps, though nights are often disrupted by the regression.
- Can I start solids at 4 months?
- Most babies aren't ready until around 6 months. Wait for readiness signs: sitting with support, head control, and interest in food.
- Is drooling a sign of teething at 4 months?
- Drooling and chewing can start weeks before the first tooth. It's common and usually not a problem on its own.
Wondering if your baby is on track?
KidyGrow learns your child's patterns and turns them into a daily brief, gentle next steps, and a prep summary you can take to the pediatrician.
Get KidyGrowSources: CDC Developmental Milestones (2023 Update); AAP Bright Futures Guidelines (4th Edition, 2024); WHO Child Growth Standards. Every child develops at their own pace.