Cako, a little monkey, wants to eat some nuts but can't reach them. He uses the scientific method to solve this problem. He observes the nuts in a cylinder, asks how to get them out, gathers information by looking in Anne's book, hypothesizes that water will make the nuts float, experiments by pouring water in the cylinder, records that his hypothesis was correct, and concludes that water makes nuts float like a boat. The story demonstrates the seven steps of the scientific method: observe a problem, ask a question, gather information, make a hypothesis, experiment, record results, and draw a conclusion.