As discussed in lecture; Children who are younger than 6 years of age focus exclusively on dimension, for examples, the height of liquid or length of chips. One of an example, is that if you put two equal amount of water in two different size glasses; the young children tend to think that the amount in the bigger glass is more than the small glass. The reason for this is because that they're too young to tell the difference. I think this is kind of interesting because I never thought about this before. So, I decided to do the little experiment, I put same amount of M&M chocolate in two different size containers. One container is shorter than the other one. and I asked my five years old nephew which one container contains more M&M chocolate. He pointed to the long container. But, the fact is both containers contain the same amount of M&M chocolate.