In all playgrounds, a piece of ground should be laid out; and there should be erected thereon, a couple of posts, about twenty feet apart, and sixteen feet high, which should support a plank, about a foot wide, and six inches thick; on the underside of this might be affixed a hook, from which a triangle might be swung,--this is capable of being used in a variety of ways. Two more hooks, about a foot apart, might be used for two ropes, so that the more advanced pupils could climb to the top by means of grasping a rope in each hand, and without the assistance of the feet. A pole may rise from the ground to the cross piece about midway: the pupils will be able to climb up this without the assistance of the feet. A wood ladder and rope ladder may occasionally be fastened to the beam, but may, when necessary, be taken down. A board about a foot broad may also be set up against the beam, inclining four feet from the perpendicular: the climber will grasp the sides with his hands, and placing his feet almost flat against the board, will proceed to the top: this is an advanced exercise. Another board may be set up which should be three feet broad, at least, and should slant more than the other: the pupil will run up this to the top of the beam easily, and down again. The middle of this, up to the top, should be perforated with holes about four inches apart, in which a peg may be placed: this may be in the first hole to begin with. The pupil will run up and bring this down, and then run up and put it in the second, and so on, till he has arrived at the top: then two or more pegs may be used, and it may be varied in many ways. A pole, twenty-five or thirty feet high should be erected, rather thin towards the top: at distant intervals of this, three or four pegs, as resting places, should be fastened; another pole, thicker, from about sixteen to twenty feet high, should be erected; on the top of which should be placed four projecting hooks turning on a pivot: to these hooks four ropes should be attached, reaching to within two feet from the ground. This is called the "Flying Course," from an individual taking hold of the peg at the end of each rope.