A Preschool Student's Unusual Behavior

I am a toddler teacher. I have been seeing an unusual behavior from a child in my classroom and don't know how to deal with the situation or if I should deal with it at all. There is a child who is social with teachers/adults and will talk to children maybe once a day. All the children in the classroom play together in small groups but this child only walks around an item in big circles all day long. If we go outside the child will begin to walk around a certain toy out there as well. It's very strange and I have never seen this behavior before. Is this normal? I spoke to the parents and they think it's the child's personality and that the child is shy. I don't believe so because the child doesn't play by himself either so it doesn't make sense that he is shy. Has anyone ever had a child with the same actions? The child speaks very well and is very smart.
You owe it to these parents to urge them to have their son evaluated. Ask them to talk to their pediatrician about this specific behavior. It may only occur in school, and the parents may not see it at home, so they need you to tell them about the unique behavior not found with other children his age. There are also free options that will help evaluate this child. If he is under 3 years old, have the parents call the Orange County Regional Center and describe the behavior and ask for guidance. They will probably also ask for a doctor’s evaluation, but they can give assessments and offer suggestions as well. If he is over 3 years old, have them contact their local school district. The school districts will assess children as young as 3 and offer services if he qualifies for any. You may need to put your concerns in writing, simply describing the behavior and your concerns along with your recommendation that they seek the advice of their doctor.