All I can say is good luck. I have had 2 kids in care like this over the years and it honestly was the hardest type of child to work with. The days they came were the longest in history lol. I spent months trying to get them to play/work or do anything independently and no go! They left to go on mat leave and when they wanted to return I was suddenly full I have no suggestions other than to stay consistent every single time she does it! Encourage free/independent play. Have the other children model independent play and show her that so and so is playing very well with the fire truck etc