I have a 3 year old girl who always wants to have what her young friend at the childminder wants. This can be a chair he is sitting on or a toy etc... I have tried many things including a sticker chart which worked for a week. She has now pushed him off the chair and I have had a 1st warning. Does anyone have any tips????? Other than this she can be the most pleasant child, she will be starting school nursery in September and I am dreading what will happen if this doesnt stop....