The kid pack a lot into a July morning. They pick and eat wild raspberries, jump off a big rock (they call it a “diving board”) into a creek and run around. They observe a field mouse, and eat a snack. They shriek while bouncing up and down on a fallen log. Soon this kind of summer fun will end for most children in the Shenandoah Valley ­– at least on weekdays. For kids in the area’s two new “forest schools,” however, the creek splashing, centipede study, hiking, picnicking and everything else will carry on.