This article describes some aspects of Piaget's Theory of Cognitive Development. It highlights the importance of giving young children specific access to explore conservation in measurement, which will give students invaluable experiences in measurement that in years to come will be regarded as their prior knowledge of the concept. This is explored through the discussion of the complex nature of conservation and the benefits of play, with the integration of the two elements in the practical teaching suggestions. The anticipated result will be a decrease in misconceptions and an increase in enthusiasm and curiosity towards measurement concepts (by both students and teachers). (Contains 4 figures.)