Kids are dumb part 2. part 1: /Kids+are+dumb/funny-gifs/5110954/.. People, it's psychology 101. Children ages 3-7 are not developed enough to grasp the concept of conservation or reversibility. If any of you had done this exper Kids are dumb part 2 1: /Kids+are+dumb/funny-gifs/5110954/ People it's psychology 101 Children ages 3-7 not developed enough to grasp the concept of conservation or reversibility If any you had done this exper