This is a book which wants to unite his undoubted visual charm a willingness to "instruct delighting and instructing playing" is. By presenting a series of attractive games, often fun, conveys useful notions that seek to awaken curiosity in children for all the productions of nature and art. Taking advantage of the amazing sensitivity of the child to the facts that are presented, these games will inculcate some rudiments of science and, moreover, by teaching through games, teaching him to use his hands, to make himself toys and gadgets that need, the child acquires manual dexterity. This book is aimed at both children and their parents, and presents great pedagogical possibilities both in the family and at school. Inadvertently, playing, children learn to love nature and begins to understand the mysterious mechanisms of the world.