Autism is a lifelong neuro-developmental disability that affects the development of the brain.
It affects the brain in 3 different areas:
Children with a diagnosis of ASD often find it difficult to engage with others in the community. The spectrum of ASD is so broad that it can affect children in completely different ways, there are no two children with autism that present the same way. Some children with a diagnosis of ASD are non-verbal. This means they have limited language skills or no language skills at all. Others with the same diagnosis can have a large vocabulary or great language skills but no understanding of language. This falls under receptive language.
Children with autism often find the world we live to be very scary and unpredictable, thus they practise this repetitive behaviour as it is predictable and calming for them and makes them feel in control and safe.
There are many differences between early signs of autism in a child and personality quirks that they may have but one (as pictured below) involves a child constantly and repetitively lining up toys, soft toys, books or whatever they can get their hands on.