On a touch screen interface, the visitor is invited to perform a memory test against a chimpanzee. The visitor sees various numbers distributed on the screen and he should memorize their position. When the visitor is ready, touch the first number. All other numbers disappear. Now the visitor has to touch the points where the other numbers have been distributed - in the right order from 1 to 5. While playing, the visitor can see how quickly the chimp is doing this test at the same time. The visitor can play on different levels against the chimpanzee. In 99% of the cases the chimpanzee will win against the visitor.