I read Bridge to Terabithia at an older age- probably 10- and I still remember sobbing hysterically at the end. There is no reason that movie should be shown!

As a teacher, it is difficult to stick to G movies... but I teach middle and high school. I wouldn't show or ask permission to show a PG movie to a younger group. that is a parental decision on a movie by movie and kid by kid basis. There are always substitutions. If you're trying to show a PG movie, you're not teaching to your age group.