How do i change a childs traits when they are born in the game of the sims 3 pets for xbox 360?

now where do i change traits for a baby/toddler/child/teen that been born to my sims in game?How do i change a childs traits when they are born in the game of the sims 3 pets for xbox 360?
U have to wait until they are adults than use their lifetime points to get the midlife crisis opinion and change their traits.

Hoped I helped!!!