What was the main problem in the book Bridge To Terabithia? How did the main characters solve it? Who are the main characters names?

The main characters in the book Bridge to Terabithia are Jess Oliver Aarons, Jr and Leslie Burke. The main problem is Jess's low self-esteem, he has high expectations, and thinks lowly of himself. Upon meeting Leslie and creating Terabithia, Jesse finds strength and courage. He sets a goal of being the fastest kid in the fifth grade to give himself identity, glory and purpose.