The car had a square back and a black registration plate with white writing.
The woman told police the car stopped on Riverbend Rd next to three young boys about 4.15pm on Tuesday.
The boys were seen speaking to the male driver before walking off towards Latham St.
Another person confirmed seeing a male of similar description on Georges Drive at the same time as the incident. He was heading towards Kennedy Rd and looking behind.
The man was described as a Caucasian, clean-shaven, in his early 20s, of slim build and about 1.7m tall.
He had short straight brown hair and brown eyes and was wearing a blue checked long-sleeved shirt, black jeans and a yellow plastic watch on his right wrist.
Mr Leonard appealed for anyone who believed they knew the offender's identity to call the police on 831 0700 or Crimestoppers anonymously on 0800 555 111.