The present experiment was designed in order to look into the effects which exposure either to a demonstrator performing the task or to the task in itself had on young mouse's skill in solving a problem. Three experimental groups were organized. In the first group the pups spent 7 days with a demonstrator solving the problem; in the second one they spent the same amount of time with an adult unable to solve the problem. In the third group each pup spent 7 days with only the task at its disposal. At the end of this period all pups were tested to assess the degree of skillfulness reached during the training. Results showed that the animals with the demonstrator were the better performers in solving the problem.