There are many main themes in Bridge to Terabithia. One of the most important is Jesse and Leslie's magical kingdom in the woods called Terabithia. Terabithia is a small castle they built in the woods where they go to escape and have magical adventures. The "bridge" is a rope they use to swing over the dry creek. Another main theme is Jesse running every morning during the summer so he can be the fastest runner in fifth grade, only to be beat by Leslie, the new girl in town. One more theme is Jesse being the only boy in his house. He has two evil older sisters, who always get their way by whining. He has a younger sister who looks up to him and a baby sister, who of course, gets all the attention.