It costs but little to supply a class with clay, for the same material may be used again and again. It is desirable, however, to have a sufficient supply to permit the preservation of the best work for some time. Clay may be bought ready mixed at art stores and in kindergarten supply stores. The common gray clay costs two or three cents a pound. Artists' clay costs five cents a pound. A cheaper kind can be obtained of manufacturers of sewer pipes. The teacher will find suggestions regarding the use of clay in Frye's _Child and Nature_, pp. 36-8; Kellogg's _Forty Lessons in Clay Modeling_; Prang's _Art Instruction in Primary Schools_, First Year, pp. 27-39, Second Year, 32-43; and in Kate Douglas Wiggin and Nora A. Smith's _Froebel's Occupations_, pp. 32-43. Excellent articles illustrated by the work of children appear in _The University Elementary Record_, which is published by the University of Chicago Press, Chicago. _Basketry._ The materials of which baskets are made are less pliable than clay or sand, yet the child of seven is able to manipulate some of them. Where possible he should be encouraged to exploit his environment in the search for raw materials that are adapted to this purpose. In many localities tough grasses, willows, rushes, or other pliable materials are present, and even though the child finds little that is adapted to the purpose, the mere search for materials enables him to appreciate the value of the commercially prepared ones and aids him in picturing these materials in their raw state. The pleasant days of autumn should be used for collecting such supplies as are available at that time. These may be prepared for use and stored until they may be needed later in the year. If the child makes a ball of braided grass he will find many ways of using it later in making baskets, mats, cradles, sandals, or anything which he may choose to make of it. Where natural materials cannot be obtained, commercially prepared ones may be substituted. Raffia, uncolored or colored with vegetable dyes, rattan reeds, and splints may be obtained wherever kindergarten supplies are kept, as well as in large seed stores and in most of the department stores in large cities. Of the many books that are appearing upon the subject probably none is more suggestive with reference to the significance of the art than George Wharton James's _Indian Basketry_, and none more helpful with reference to mastering the processes than Mary White's _How to Make Baskets_.