When Do Babies Start Blowing Raspberries?

Babies often start blowing raspberries at around 4 to 6 months, although some begin earlier and others take longer. A raspberry is the bubbly sound made when a baby pushes air through closed or loosely pursed lips, usually with plenty of saliva. It is a playful communication and mouth-movement milestone rather than a skill that must appear by an exact age.

If your baby is not blowing raspberries at 6 months, this alone is usually not a reason to worry. Babies develop in different ways and may prefer squealing, cooing, babbling or experimenting with other sounds. What matters more is their overall pattern of interaction, hearing, movement and communication.

Why do babies blow raspberries?

Blowing raspberries gives babies a satisfying way to explore what their lips, tongue, breath and voice can do. They are learning that moving their mouth in a particular way produces a sound and often gets an interesting response from you.

This playful behaviour may help babies practise skills involved in later speech, such as controlling airflow and coordinating movements of the lips and tongue. It is not speech itself, however, and it does not predict exactly when a baby will say their first word.

Raspberries are also social. Your baby may blow one, pause and watch your face. If you smile or copy the sound, they may do it again. This back-and-forth exchange is an early form of conversation, sometimes called serve-and-return interaction.

Is blowing raspberries a developmental milestone?

Blowing raspberries is a common developmental behaviour, but it is not a pass-or-fail milestone. Some babies do it frequently, some only briefly and some seem to skip it. Development is best understood by looking at a range of abilities rather than one specific action.

Around this stage, you may also notice your baby:

• cooing, squealing or beginning to babble
• turning towards familiar voices or interesting sounds
• smiling and making eye contact during interaction
• copying facial expressions or sounds
• bringing their hands and safe objects to their mouth
• taking turns making noises with you

There is a wide range of typical development. Babies born prematurely may reach milestones according to their corrected age, particularly during the first two years. Your maternal health nurse, midwife or GP can help you understand what to expect for your baby.

Are raspberries a sign of teething?

Blowing raspberries can happen at the same time as increased drooling and chewing, so parents often wonder whether it means a tooth is coming. It may occur during teething, but raspberries alone are not a reliable sign. Babies naturally produce more saliva and explore with their mouths during this developmental period, sometimes well before a tooth appears.

Possible teething signs include tender or swollen gums, wanting to chew and being a little more unsettled than usual. High fever, significant diarrhoea, persistent vomiting or a very unwell baby should not be assumed to be teething. Read more about when babies start teething.

How to encourage blowing raspberries and early communication

You do not need to teach this skill or use special toys. Warm, responsive interaction is the most useful support. Follow your baby's cues and keep play relaxed.

Copy your baby

When your baby makes a sound, copy it and then pause. Give them time to respond. They may repeat the sound, move their body, smile or answer in a completely different way. All of these responses count as communication.

Talk face to face

Hold your baby comfortably where they can see your face. Talk about what you are doing, sing simple songs and use an expressive but natural voice. Your baby learns from seeing how your mouth moves and hearing language during everyday care.

Follow their lead

If your baby is alert and interested, continue the game. If they turn away, arch, fuss, yawn or become overwhelmed, offer a break. Responsive parenting means noticing and respecting both invitations to interact and requests for rest.

Make everyday moments conversational

Nappy changes, feeds, baths and cuddles are opportunities to talk and pause for your baby's reply. You can describe what they are looking at or respond to their sounds as though you are having a conversation. Explore more age-appropriate guidance in the Baby Hub.

Why is my baby blowing raspberries while feeding?

Some babies experiment with raspberries at the breast or bottle, especially when they are becoming distracted or feel playful. They may also splutter or make bubbly sounds if milk is flowing faster than they can comfortably manage.

Watch your baby's cues. If they are smiling, relaxed and growing well, occasional playfulness is usually harmless. If they cough, choke, pull away repeatedly or seem distressed, pause the feed, hold them upright and let them recover. For bottle feeds, check that the teat flow is appropriate and use a responsive, paced approach. Never enlarge a teat hole yourself.

Frequent coughing, choking, breathing changes, very long feeds, poor weight gain or distress during feeding need assessment by your maternal health nurse, midwife, GP, paediatrician or an appropriately qualified feeding professional.

Do raspberries mean my baby will talk soon?

Raspberries are one part of early sound exploration, but they do not provide a countdown to first words. Babies generally move through cooing, varied vocal play and babbling before meaningful words emerge. The order and timing vary.

Support language by talking, singing, reading and responding to your baby's attempts to communicate. Background television or audio is not a substitute for direct interaction. Babies learn best through responsive exchanges with trusted people.

What if my baby does not blow raspberries?

A baby can develop communication skills normally without ever becoming an enthusiastic raspberry blower. Notice whether your baby uses other ways to connect, such as looking towards you, smiling, vocalising, reacting to voices or taking turns during play.

Try not to compare your baby with videos or another child of the same age. If you have questions about hearing, interaction or development, raise them at your baby's routine health review rather than waiting for a particular milestone.

When to seek help

Not blowing raspberries by itself is rarely urgent. Contact your maternal health nurse, midwife or GP if your baby:

• does not seem to respond to voices or loud sounds
• rarely makes sounds or has stopped making sounds they previously used
• has limited eye contact or rarely engages with familiar caregivers
• has lost any previously acquired skill
• regularly coughs, chokes, changes colour or appears distressed during feeds
• has difficulty feeding, fewer wet nappies than usual or is not gaining weight as expected
• has movements, muscle tone or development that concern you

Seek urgent medical care or call your local emergency services if your baby has trouble breathing, turns blue or grey, is very difficult to wake, has a seizure, or is choking and cannot breathe or cry. Trust your instincts: if your baby seems seriously unwell, seek urgent help.

The bottom line

Most babies who blow raspberries begin around 4 to 6 months, using the sound to explore their mouth and enjoy early social exchanges. It is a fun behaviour, not a test your baby must pass. Smile, copy them, pause for a reply and enjoy the wonderfully messy conversation.