Is it normal...to have a 4 year old over active child? Who you know that is only trying to get your attention after she knows that attention now is focused on little sister? From a really well behaved child to a really mischievious child throwing tantrums all the time?

Its normal for toddlers to feel a bit of jealousy towards their younger siblings as they used to have the spotlight.. I am experiencing it at present with my 3 year old son.. What I do is I always call him whenever the baby cries and says, "Be like your older brother.. He is very nice and loving.." Then I'll ask him to talk his little sister too.. It boosts their confidence and mostly gives them a bit of responsibility..