The child explores dimension, shape, color, texture, weight, aroma, taste, pitch, and their relationships through a series of exercises called the sensorial materials. These materials isolate various qualities so that the child can experience each one individually. The materials are largely self-correcting so the child can accomplish the exercises alone. Moreover, they are structured, building on what has been previously learned. A sense of order is found in these materials and the child acquires the joy of learning that their environment also has order.