Obesity is a disorder in which a person's weight is above what is considered healthy according to his height. Currently, childhood obesity is a problem that affects a large number of developed countries in which the number of children and adolescents who are overweight is growing at an alarming rate. Obese children can have serious health problems in adulthood, and develop heart disease, diabetes, asthma, high cholesterol, sleep apnoea, etc. In addition to physical consequences, childhood obesity can also lead to psychological problems, such as low self-esteem, depression or feelings of inferiority, which prevent the child from interacting with others and limiting their social relationships. Sometimes the problem of weight can be caused by a disease or a hormone imbalance, but most often it is due to poor diet, hence the importance of teaching healthy habits to children.