en you take two straws exactly the same size and put them side by side, the children think that they are the same; when you push one up a little further the children think it is bigger because it is higher. There are lots of examples to show that children in grades primary through to about 5 or 6 can not get these questions right. One of the achievements of Piaget's research is the universal acceptance of the fact that children do not think like adults, they think differently and in different categories....
