Example: Children are shown two identical beakers filled to the same level with water. The experimenter then pours the contents of one beaker into a tall thing tube. Participants who had previously said the amount in each beaker were equal are now asked whether there is as much, more or less water in the new container. At the intuitive stage, they will almost always say that there is more because the water level is much higher in the tube. This shows that they are misled by the appearance as well as by lack of specific logical abilities.