Memories of a Past Life
It's also possible for children to have such a strong memory from a past life that they have trouble separating its reality from their current life. They may treat you or others differently from the role they are currently experiencing. They may act like your parent or take on another family role.
Children can see someone as a threat in this lifetime in response to a situation is carried over from a past lifetime. They may react to a certain individual's presence with fear or other abnormal behavior. If you observe this, you may want to give the child a chance to tell you at an opportune time why they feel the way they do about that person. You may be able to help them adjust to this lifetime and help them use their intuitive ability as part of their guidance system in the future.
Working Through Unresolved Karma
A child may actually be part of an old unresolved karma from a past life. They may bring with them the opportunity for those close to them to begin to get back in tune with their soul's journey. It may be something between just you and a child, or it may involve even more players. Whatever the lesson is, the child is a part of it, and if it is not resolved, you may need to continue in another lifetime.
This old karma may include the carrying forward of psychic abilities from a past life. These abilities could have been developed for a special purpose, such as for survival. The problem is, this life is different, and the child may not know how to adjust their intuitive abilities from the past to their present life. The sooner you recognize that a child is struggling with an issue from the past, the sooner you can help them become in tune with their purpose in this life.

