Boy, a male friend and two girls are playing in fields. The two boys get the girls to show them their (long, Victorian-style) knickers by lifting their dresses. The male friend clumsily tries to touch one girl and ends up wrestling with her. “Boy” has his arm around the other girl.
Lewellen talks a 10 year old boy into showing her his penis by promising him a kiss if he does so. He lowers his pants. You can see his underwear. However, no nudity is seen.