Abstract: There is a renewed focus on the geometric learning of young children in today’s mathematics curriculum. This paper, in the light of the results of the study by Clements, Swaminathan, Hannibal, and Sarama (1999), “Young Children’s Concepts of Shape”, attempted to determine the criteria used by Primary One and Primary Two children in Singapore to distinguish members of a class of shapes, namely circles, squares, triangles and rectangles. It also aimed to find out whether there was evidence of a prerecognitive level before the van Hiele Level 0 (Visualization).