Children of early and preschool age grow and develop rapidly, therefore, eating disorders of any kind are very dangerous. Considering that these are children of early and preschool age, the main role in shaping eating habits is played by parents, followed by educators. Children in this age group most often suffer from atypical eating disorders such as selective eating, emotional food avoidance disorder, dysphagia and the like. Children who are allergic to some foods (nutrients) and therefore avoid them or do not consume them at all should be singled out. Acute disorders of the gastrointestinal tract, such as diarrhea, vomiting and consequent dehydration, can lead to malnutrition, so it is necessary to seek medical help. Obesity is also a widespread disorder in children and can cause a number of complications such as high blood pressure, heart and blood vessel disease, muscle and bone disease, diabetes, psychological and behavioral problems. The lack of certain nutrients in the diet, such as iron or zinc, can lead to the appearance of certain diseases, but can also lead to the desire to eat inedible things (pica disorder). Some children cannot tolerate gluten in their diet, i.e. they are allergic or have celiac disease, and the basic of treatment is the complete exclusion of certain grains from their diet. Parents and educators have great importance in nutrition and possible disorders, especially to educate themselves in a timely manner about possible nutritional disorders, so that they know how to help children and guide them towards proper nutrition.