In our study, we tested three commonly used strains of laboratory mice in a simple behavioural test. In the climbing test, we looked at the time of the first climb and the number of climbs of the different strains during the 5-minute test time, depending on sex and age. Based on our results, neither tribe nor sex affected climbing time and the number of climbs, but different ages did. The younger animals completed the test much sooner and climbed much more often than the adult animals. Based on our results, we can say that in a more straightforward behavioural test, different mouse strains do not have as much effect as age.