There are two main factors that affect a child’s more long-term habits. One of these is the child’s nature or character, known in medical terms as temperament, whereby each child has individual differences in behavior and personality. Temperament, however, is not the only determining factor—the environment a child is raised in and the care they receive from parents and families are also incredibly important.
Even for a child who acts impatient, overbearing, or selfish, if their family upbringing helps them to change and modify these more aggressive habits, then when that child grows up, he or she does not need to have such an extreme temperament and will be able to control his or her emotions in a positive, constructive way.
Many children at this age may naturally be more impatient or easily upset or have mood swings, as this corresponds to their brain development as mentioned above, and some children will express these behaviors more visibly than others. As such, parents will need to give more attention to modifying those behaviors so that they develop in the right direction.

