Our DD (5) loves picking up stones!
I think perhaps when she is anxious or overwhelmed. We bumped into her Key Worker from Nursery earlier, who she adored! She stopped walking and started picking up stones off the ground. She also used to lick me the moment she spotted her!
She often likes stones and coins.
She will sometimes search for stones on the ground on the way into school. Is this a common ASD/OCD behaviour do u think?!