The astronomy blocks are star shaped, painted blue. The geology blocks are diamond shaped, painted brown. The chemistry blocks are hexagonal in shape, painted red. The geography blocks are globular in shape, painted gray. The blocks representing physics, are octagon shaped, painted yellow. The botany blocks are oblong, painted green. The physiology blocks are triangular in shape, painted pink. The history blocks are square, painted black. A large number of the key-words of the sciences, are painted on blocks, which, in size, shape and color, are counterparts of those that represent the heads of families to which they belong. This scheme of blocks, furnishes the ground work for the construction of a great number of games, for the amusement and edification of the children. Games of word-building, such as spelling out the names of fishes, insects, reptiles, birds and animals. Also of building the names of familiar things, houses, stables, light-houses, factories and mills; rivers, ponds, lakes, mountains, trees and fields; hats, shoes, coats, cloaks and other articles of clothing; common household utensils in every day use, such as pots, kettles, pans, pails, cups, knives, forks and spoons; stove, shovel, tongs, mop and broom; toys, dolls, balls, kites, tops, etc. By the use of many such ingenious games, the children unconsciously become familiar with the names of the sciences, and with all the principal words, which belong to each one. For example: Names of heavenly bodies in the domain of astronomy. The sun, the moon, the milky way, the planets, the constellations, the polar star, and the names of twenty stars of the greatest magnitude: In the domain of geology, fossils, shells, minerals, rocks, shales, clays, gravels, and the names of geological periods: In the domain of chemistry, the names of acids, gases, metals, crucibles, retorts, mortars, and the names of a great variety of chemical combinations: In the domain of geography, globes, hemispheres, continents, islands, oceans, gulfs, bays, and straits; equator, tropics, circles, longitude, latitude, etc. These examples, will furnish an approximate idea of the wide scope in scientific names, covered by these key-words, when applied to all of the sciences. In such plays of science grouping, the interest and pleasure of the children is intensified, by applying a system of personification, to the families of the different sciences: For instance, Mr. Astronomy Blue; Mrs. Geology Brown; Mr. Chemistry Red; Mrs. Geography Gray, etc.