In most cases these fears are a normal part of development. As with adults, it is appropriate for children to be fearful at times. Fears alert us of dangerous situations. Just because many fears are considered normal does not mean that parents should ignore them. Often children are unable to identify what makes them fearful.
Children can express anxiety in many ways.
Changes in normal activity level. Changes in eating habits. Changes in sleep habits. Parents should keep in mind that children experiencing normal fears do not generally experience the above symptoms. There are many things parents can do to help children pass through the stages of normal fears without them developing into phobias.