The article reviews various aspects of evaluation and testing of children in their early years, based upon theories and research concerning language related problems and testing for autism in young children. Within the article, the author outlines a number of tests and evaluation techniques available to those working with young children and concedes that evaluation is necessary for learning. In relation to this the author also pinpoints the dangers of evaluation and testing, as having possible harmful effects upon the child. In relation to this, the author proposes that it is important for teachers and experts to be aware of this situation, suggesting that children who have developmental problems or learning difficulties should undergo thorough and proper evaluation, so that early intervention can start as soon as possible. In addition to this, the author suggests that it is also necessary for cooperation to exist between parents, teachers and experts.