Looking for examples of ASD/Autism behavior regarding strong attachment to unusual objects

Hi,

I hope you are well.

As a parent I am looking for examples of strong attachments to unusual objects, because every child has attachments it is very hard for me to understand if this is something related to autism or not.

According DSM-5 someone with ASD/Autism can have a strong attachment to unusual objects.
I do not understand what DSM-5 means with a strong attachment to unusual objects.

I am trying Google Scholar but I cannot find any research with examples.

Can you help / provide me with examples / provide me with some research ? And when do you have a strong attachment ? Only if you carry the object all the day ?

Thank you so much,