Jean Piaget proposed that children build understanding in four fixed stages, each with its own kind of logic — and its own signature experiment. Tap a stage, then press Run the task to watch the classic demonstration and see how a child at that stage responds.
Pick a stage
Choose one of the four stages to begin.
Piaget's four stagestap one to begin
One path, four stagesPiaget argued every child passes through the same sequence in the same order — only the pace differs. Each stage is not just "knowing more," but thinking in a new way. Pick a stage to try the experiment that reveals its logic.