my 4 year old has developed a strange habit of eating what other children bring for lunch at school. how can i stop this? it is embarassing. i have spoken about it but can't see any change.

you need to talk to your little one and say how it is not nice to take away from someone else's food. ask your child why he is doing this. does he not like what you give him? what foods does he take from his friends? maybe it is just that he finds their tiffin more interesting and different from what you generally give. do talk to the teacher i feel as she would be able to give you a clear look at what is happening.