Jean Piaget said children build understanding in four stages. Each stage has its own kind of logic and its own famous experiment. Tap a stage, then press Run the task to see how a child at that stage responds. At the last stage, you get to run the pendulum test yourself.
Pick a stage
Choose one of the four stages to begin.
Your pendulum experiment
String length
Weight
Drop height
Length
Weight
Drop
10 swings
Change one thing at a time and time it. Which setting changes how long the swings take?
Piaget's four stagestap one to begin
One path, four stagesPiaget said every child goes through the same stages in the same order. Only the pace differs. Each stage is not just "knowing more." It is thinking in a new way. Pick a stage to try the experiment that shows its logic.