Anxiety in preschool-age children is not only common, it's to be expected. "Anxiety is part of the normal developmental process," says Dr. Tamar E. Chansky, a Philadelphia-based youth psychologist and author of Freeing Your Child From Anxiety. Fears and anxiety are typical because they are part of what happens as a child's world—and imagination—expands. Fear also fills the gap between first encountering something and finally understanding it, she explains. "Repeated exposure and proper explanations from parents will help keep a child off the worry track."