As Iranian native, I see many children in Farsi language families who are losing their interest in learning Farsi because their parents had no time to spend on teaching them, or even worse, are not willing to talk to them in Farsi.

I know by experience that they are learning very fast when they get the chance to increase their knowledge of any language from a native teacher.

The important part is how to start the lessons. They have to be encouraged to spend enough time to learn and practice...