Kohler performed an experiment on chimpanzee with three boxes. He placed these boxes in a high ceiling room and hung a bunch of banana from the ceiling in the middle of the room. Seeing the banana, chimpanzee mjumped several times to get bananas but could not succeed. Then he noticed the boxes. He put the boxes mone upon another but of no use. Then suddenly, by, the insight an idea struck his mind. He pulled the boxe in the middle of the room. He placed the boxes one upon another again. The boxes fell for a few times but chimpanzee did not give up and continued his efforts. Ultimately, he got success in his efforts.