Children's drawings are one of the most appropriate approach to knowing children, their individuality and also their perceptions. Child is not always able to express their thoughts precisely, because their vocabulary is still incomplete and is gained just lately. In our paper we concentrate on drawing as a communication means, with which we can obtain primary numerical conceptions of children. We deal with observation of children's perceptions of number. We investigate process in which to numerical information the conceptions of numbers are assigned. The numerical information is word "three" and the child's drawing is used to mediate the numerical conceptions of children. The activity was realized with the children in the kindergarten. We analyzed draw children's conceptions of number 3 and created concept map from those drawings.