Play Is The Work Of Childhood.

Each Time One Prematurely Teaches A Child Something He Could Have Discovered Himself, That Child Is Kept From Inventing It And Consequently From Understanding It Completely.

Play Is The Work Of Childhood.

What The Genetic Epistemology Proposes Is Discovering The Roots Of The Different Varieties Of Knowledge, Since Its Elementary Forms, Following To The Next Levels, Including Also The Scientific Knowledge.

Knowing Reality Means Constructing Systems Of Transformations That Correspond, More Or Less Adequately, To Reality.

Experience Precedes Understanding.