Why kids throw temper tantrums?
Temper tantrums in children are common; so common that we've invented phrases like "terrible two's" to describe this stage of a child's development.
By the time children get to be about 4-5 years old, however; you should see these tantrums declining significantly.
Part of this has to do with brain maturation- the brain areas responsible for emotional control usually start showing strong development around 4-5 years of age.
The other part has to do with language development- children at this age are better able to use their words to communicate their needs rather than throwing tantrums.
Tantrums usually persist in children because they have learned that throwing tantrums helps them get their way- whether it's getting their parent's attention, getting the toy they want, or getting out of doing something they do not want to do.
Overtime, if parents and caregivers feed into these tantrums, these behaviors can worsen to the point that they can be very challenging to manage.