It shows them being approached by a woman who lashes out before fleeing.
Staff working in the surrounding shops say it all happened incredibly quickly, one only hearing a scream from the mother, as nearby shoppers rushed to help.
The little girl has been left with facial injuries, as well as the mother and daughter being left shaken and scared by the incident.
The woman behind the attack has not been found.
She’s described as having a medium build and a shaved head, and was wearing a pink singlet and grey shorts.
Police are asking anyone who recognises the woman or who witnessed anything in the area at the time to come forward.
Anyone with information can contact Crime Stoppers on 1800 333 000.