From a quality point of view, this series of books is excellent with laminated pages and solid yet my son is far from a tender with its business. The quality is very good explanations, the designs are simple but well illustrate the text. For the specific case of "The Farm", we are told that quest manure, milking cows, how the yard of one soccupe and the pig, sheep shearer why, why is raised ostriches preparation soil for planting and harvesting, and the vegetable garden, the orchard It's very rewarding for children from 3 years and much more!