You are the parent of two young children, ages 4 and 6 years. They have been playing outside and they come running inside asking for a drink. All of the drinking glasses in the house, except two, are dirty

One of these glasses is tall and narrow and the other is short and squat. You KNOW that your children will argue with each other if one thinks that the other child is getting more to drink. Based on your knowledge of conservation of liquid in preoperational children, what should you do to avoid an argument? Explain your answer.
What will be an ideal response?

A good answer will be similar to the following:
Both of your children are in the preoperational period of cognitive development. You know from your knowledge of Piaget's theory that children who are in the period of preoperational thinking cannot do conservation of liquid tasks. These children will focus narrowly on the height of the liquid without considering the circumference of the container. If you give your children equal amounts of juice, but use the tall, thin glass and the short, squat glass, they will focus on the height of the juice and will conclude that the child with the tall, narrow glass received more juice than the other child. To avoid an argument, fill the glasses so that the height of the liquid is the same in both glasses.