Autism is a developmental disorder that appears in early childhood.
Autism is the most common condition in a related constellation of disorders known as autism spectrum disorders, also called ASDs.
Ben and Jack can be seen having fun in florescent jackets, police hats and playfully arresting officers.
They also tried their best mean poses for photos in front of the car.
A short time later PC Amy Bianchini from Fratton and Baffins Neighborhood Policing Team brought a police car and uniform for Ben and his friend, Jack, to try on.
Not long after that, a second car from Cosham, a suburb of Portsmouth, arrived to bring further company for the birthday boy.
These social rules are not necessarily the social rules of neurotypical individuals.
Police paid a friendly visit to a boy whose mum put out a plea on Facebook asking for people to send him birthday cards.
Ben Jackson's mother, Lisa, detailed how nobody had turned up to his last birthday party despite sending out 25 invitation in the online post.
Some features of autism include: Autism usually appears before a child is 3 years old.
Some signs of autism may be evident as early as 10 to 12 months, and certainly by 18 months.