In turn you can build up, with its accommodating materials, the Sea of Galilee and the scene of the feeding of the five thousand, all Palestine with the courses of Christ's journeys, Asia Minor and Macedonia with the route of Paul on his second great missionary journey. Much of this the children themselves will help you prepare, and will learn a great deal by so doing. Indeed, the wise teacher will do as little as possible herself even in getting ready to teach, and will make her scholars themselves her assistant teachers. That is one of the beauties of such kindergarten devices as pricking paper and weaving bright yarn back and forth to fill up the picture outlined by the holes. It is the scholars' work, and not your own, and they do not forget their own work. Simple designs illustrating the lessons can thus be pricked into the children's memories at the point of a pin. It is best not to confuse the class with a multiplicity of objects, but to fix on a single symbol for each lesson, that will stand distinctly for the lesson in the weekly and quarterly reviews. The kind of object should constantly vary. If this week it is cut out of pasteboard, next week let it be modeled in clay, and the following week let it be a picture in black and white. The simpler, the better: a cup for the lesson at Sychar; a dried leaf for the parable of the fig-tree; a square of white cloth for Peter's vision on the housetop. Do not produce the object till you want it in your teaching, or the children's interest will be dissipated before you have need of it. Get a little cabinet in which to store all your teaching apparatus. Do not keep the object in sight after you are through with it, or you will lose attention from your next point. Remember, in all object-teaching, how inferior is any symbol to the truth symbolized,--its shadow only, a mere hint of it,--and learn to drop the interest-exciting object and use the interest for the truth you want to teach. In this branch of your work a knowledge of common science will prove invaluable. Botany and geology, chemistry, zoölogy, and astronomy open one's eyes to the beauties and marvels of God's handiwork, and disclose analogies abounding and true. There is much also to learn from the books of models,--models for suggestion, of course, and not for slavish imitation,--such as Tyndall's "Object-lessons for Children," Roads' "Little Children in the Church of Christ," and Stall's "Five-minute Object-sermons to Children," or his "Talks to the King's Children."