Mountain gorillas spend most of their time eating a variety of plants, insects, and worms. Youngsters tumble, climb, and run, playing follow the leader. Another group plays a rowdy game of king of the mountain. Several adults watch the action, relaxing nearby. Is this a playground scene at school? No, guess again. It's a lush mountain forest high in the Virunga mountains of Africa, and the playmates are young mountain gorillas under the watchful eyes of their mothers.