In general, if the first child to sleep alone, they will feel fear.
When your child sleep with you feel warm and bad dreams will not make them scared.
But once they start to sleep alone in a separate room, first they will face the fear of being understood bad dreams.
When kids nobody to hug when bad dreams are nervous. And the kids were afraid of dark rooms also, they can lead to insomnia.
So good to train them when they can sleep alone. When the child is age 6 - 7 years old, you can still sleep in the room with you. But most good start teaching them to sleep alone know how to deal with fear when alone.
But this tutorial should be moving forward slowly until they no longer feel alone. Tuition for them, so they will no longer have fear.

