I help officiate a kid's Y league here in my town. One time last year I was working with a volunteer who happens to play aduld league with me and complains about calls more than his share. At one point a kid took a shot and missed everything. No one went after the ball so he went and grabbed it. My partner comes up with travelling. I walk over calmly and ask what he had called. He explained it quickly and I informed him that it was not a travel. We gave the ball back to the team that rebounded and played on. At half time I explained the rule to my partner and he hasn't complained about that call since in our league. One down, 500 to go.