Critical Thinking Exercise

Alex and Andy are five-year-old friends. They are playing next to each other in a sandbox. Each child is taking a bucket, filling it with sand and then emptying the bucket into another. They do this repeatedly. All the while they talk. Alex says, "Now I put the sand in this one." Andy answers, "The sand goes from the blue bucket to the red one."
They then each begin to line-up several toy vehicles. Andy says, "the trucks go in the back." Alex says, "I put the red ones here and the green ones there."

1		Explain what is occurring from a Piagetian perspective.
2		What skills might pouring the sand from one bucket to another help to develop?
3		Explain what is occurring from a Vygotskian perspective.