A Perth mother was left "disgusted" after a gang of girls went on a violent rampage in a McDonald's restaurant on Friday afternoon.

Destiny, who does not want to reveal her surname, said her three-year-old daughter and 11-year-old son were in the playground at Maddington McDonald's when three girls came running in to the restaurant about 1pm.

Maddington McDonalds.

Soon after a black four-wheel-drive pulled up outside and a group of 10 or 11 teens got out.

"As soon as they got through the door, they've started grabbing things from the McCafe - dishes and cups, and trying to smash saucers and cups."