What Do Early Signs of Autism Look Like?

​In toddlers, signs of autism often relate to differences in:
  • Communication
  • Social interaction
  • Play
  • Sensory responses
These signs can vary from child to child and may appear gradually over time.
Early Signs of Autism in Young Children (1–5 Years)

It’s common for parents to notice when something feels a little different in their child’s development, but it’s not always clear what is typical and what may need further support.

Autism Spectrum Disorder (ASD) is a neurodevelopmental condition that affects communication, social interaction, behaviour, and sensory processing.

​Some signs can be noticed in toddlers and preschool-aged children, although every child develops at their own pace.
What Are the Early Signs of Autism?

Early signs of autism in toddlers may include differences in:

Social Interaction Differences
  • Limited eye contact
  • Reduced interest in interacting with others
  • Preferring to play alone
  • Not consistently responding to their name
  • Difficulty sharing attention (e.g. not pointing to show things)

Communication Differences
  • Delayed speech or language development
  • Limited use of gestures (pointing, waving, showing)
  • Not using words to communicate needs
  • Repeating words or phrases (echolalia)
  • Loss of previously used words or skills

Play Differences
  • Repetitive play (e.g. lining up toys)
  • Limited pretend play (e.g. feeding a doll)
  • Strong focus on specific objects or activities

Behaviour & Sensory Differences
  • Strong reactions to sounds, textures, or environments
  • Becoming upset with changes in routine
  • Repetitive movements (e.g. hand flapping, rocking)
  • Difficulty calming when upset
How Do Toddlers with Autism Play?
​
Children with autism may play differently, for example:

• Repeating the same activity over and over
• Focusing on parts of toys (e.g. wheels, buttons)
• Less pretend or imaginative play
• Preferring familiar activities

However, play styles vary widely between children.
What’s Typical vs What Might Need Support?

It’s important to remember that all children develop differently.
Some toddlers may show one or two of these signs and still be developing typically.

However, you might consider exploring further support if:
  • You’re noticing several of these signs together
  • The differences are ongoing (not just a phase)
  • They are impacting daily life (e.g. communication, play, routines)

Trusting your instincts as a parent is important here
Not Sure What to Do Next?

It’s very common to feel unsure.

Every child develops differently, and concerns don’t always mean a diagnosis.
If you’re starting to notice these signs, you’re not alone, and there are clear next steps you can take.
Read our step-by-step guide: ​
Want a Broader Checklist by Age?

​Every child develops differently, and signs can look different as children grow.
​See how signs can present across different ages
Do You Need a Diagnosis First?

​Not always.
Many children begin support based on their needs, without a formal diagnosis.
Starting Support Early

​If you’re noticing differences, you don’t need to wait to get help.
Early support can focus on:
  • Communication
  • Emotional regulation
  • Play and social skills
  • Daily routines
When Should I Speak to a Professional?

You may want to speak with your GP or a therapist if:
  • You’re consistently noticing differences
  • You feel unsure or need guidance
  • You’d like support for your child’s development
They can help guide you through the next steps.
You Don’t Have to Figure This Out Alone

​If you’re unsure what you’re seeing or what to do next, that’s completely okay.
At Belong Health, we support families across Perth and Mandurah at this exact stage — noticing, questioning, and exploring next steps.

Book a free 20-minute call with our team
Or contact us to talk through your concerns and options
Our team is here to help call us on 08 9586 3634 or send us an email here
Download the Printable Autism Checklist
Prefer something you can tick off?
Frequently Asked Questions

​What is one of the earliest signs of autism?
Early signs of autism may include reduced eye contact, limited response to name, or differences in communication and interaction compared to other children of the same age.​

How can autism be identified in a 1-year-old?
Some early signs in young children may include limited eye contact, reduced social engagement, delayed babbling or gestures, and differences in how they respond to people or their environment.

What are early autism red flags?
Early red flags may include delayed communication, limited social interaction, repetitive behaviours, strong reliance on routines and sensory sensitivities.

What are common signs of autism in children?
Common signs may include differences in communication, social interaction, emotional regulation, play skills and behaviour. These signs can vary between individuals.

At what age can autism be identified?
Signs of autism may be noticed in early childhood, often before the age of 2, although identification can occur at different ages depending on the individual.

Can a child show signs of autism and not be autistic?
Some children may show similar traits or developmental differences without meeting criteria for autism. A professional assessment can help clarify individual strengths and needs.

How is autism assessed?
Autism assessments are typically completed by qualified professionals such as psychologists, paediatricians or multidisciplinary teams, using a combination of observations, questionnaires and structured assessments.

Is autism related to ADHD?
Autism and ADHD are different conditions, although some individuals may experience traits of both. A professional assessment can help clarify this.

When do children typically start pointing?
Children often begin pointing between 9–14 months as part of early communication development. Delays in gestures like pointing may be one of several signs that further support could be helpful.

What is an autistic meltdown?
An autistic meltdown is a response to feeling overwhelmed, often due to sensory input, communication difficulties or changes in routine. It is not a behavioural choice, but a response to stress or overload.

What are repetitive behaviours in autism?
Repetitive behaviours may include movements such as hand flapping, finger flicking or repeating actions. These behaviours can help regulate sensory input or manage emotions.

What helps calm an autistic child?
Strategies may include predictable routines, reducing sensory input, using calming activities and providing a safe, quiet space. Supports are most effective when tailored to the individual.
When Should I Be Concerned?

You may consider seeking further advice if you notice:
• Delays in speech or communication
• Limited social interaction
• Repetitive behaviours or strong routines
• Concerns raised by educators or caregivers
• A loss of previously developed skills

If something doesn’t feel right, it is appropriate to explore it further.
What Are Red Flags for Autism in a 2-Year-Old?

​Some early indicators that may prompt further assessment include:
• Not responding to their name consistently
• Not pointing or showing objects to others
• Limited eye contact
• Delayed speech or no words
• Limited interest in other children
• Repetitive movements (e.g. hand flapping, spinning)

Having one or two of these signs does not necessarily mean a child is autistic — but patterns of these behaviours may be worth exploring further.
Do Toddlers with Autism Show Affection?

Yes.
Children with autism can form strong relationships and show affection. Some may enjoy cuddling, while others may prefer different ways of connecting.

Differences in how affection is expressed are part of individual variation.
Can Autism Be Diagnosed in Toddlers?

Yes.
Autism can be assessed in young children using developmentally appropriate tools and clinical observation.

​Early assessments typically include:
• Play-based observation
• Parent interviews and developmental history
• Structured tools such as ADOS-2
• Cognitive assessment (e.g. WPPSI-IV where appropriate)
Autism Assessments for Toddlers (Under 6)

Belong Health offers Autism assessments for young children (under 6) using developmentally appropriate tools such as:
• WPPSI-IV
• ADOS-2
• Parent interviews and questionnaires

Assessments are tailored to each child’s developmental level and comfort.
Why Early Assessment Can Be Helpful

An assessment can help:
• Provide clarity around your child’s development
• Identify strengths and areas where support may be helpful
• Guide next steps for home, early learning, or supports
• Support access to services where appropriate
Get Support for Autism
If you’re looking for autism support services in Perth, Mandurah or the Peel region, our team is here to help call us on 08 9586 3634 or send us an email here
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Helping Your Child to Attend and Concentrate
Discover effective strategies to help your child improve attention and concentration at Belong Health. Our expert tips focus on minimising distractions, engaging in enjoyable activities, and using positive reinforcement to enhance your child's focus and learning experience, fostering their development and success.
How to Become an Emotion Coach for Your Child
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