Many people mistakenly believe that preteens are children aged 10 and under, but that is not always the case. Preteens can be aged 10 or 11 years old, or even younger. They are in the stage of being children but are also growing into young adults. Preteens go through a lot of changes and changes quickly. They are curious and exploratory, but also have a lot of energy and a strong sense of independence. Preteens are usually very active, restless and enjoy being outside. They are sometimes known as the "wonder Years" because they are going through so many changes.