Keep the clay in an earthen crock with a cover. Pour a little water into it first, just enough to moisten the bottom of the crock, and then put in the clay. When it is to be left over night or a longer time, make deep holes in the clay with your thumb and pour water into them. Lay a damp cloth over it and cover with the earthen top. If at any time it dries out so that it cannot be easily moulded, let it dry entirely, pound it to powder again and mix as already described. If you live in the country the place to work with clay will be in an outbuilding, a woodshed, barn or workshop where there is a good strong table or bench. The best place for a city child to work is a playroom where there is a wooden floor, an old table and nothing valuable to be harmed with clay or water; or a light, dry cellar. A girl should wear a long-sleeved apron and a boy a pair of overalls. In such a workshop and costume you need not give a thought to clothes or carpets. Have a pitcher of water and a small bowl for the "slip"--or clay thinned with water until it is about as thick as cream--which is almost as important as the clay itself. When you are ready to begin work, take a lump of clay about as large as a grape fruit; pound and knead it on the table. Next draw a strong wire through it, dividing it into halves. Press the two outer surfaces together and knead out the air-holes which you will see on the inner surfaces. Repeat this process several times, and all these air bubbles will finally be expelled. Suppose you begin with something simple--some tiny red building bricks which will delight your small brother--perhaps even you may not feel to old to enjoy playing with such a "real" toy. _Building Bricks_ =Materials Required:= About 3 pounds of clay, 2 level boards, 15 by 20 inches, 1/2 yard of white cheesecloth, A rolling pin, A foot rule, A strong, sharp knife. The clay of which these bricks are made should be well kneaded, and it should also have a great deal of what potters call "grog" mixed through it. "Grog" is baked clay pounded into small pieces--an old flower pot will do if you are using flower-pot clay. Mixed with the unbaked clay it tempers it, that is, it makes it less likely to shrink and crack in baking.