Brooke's a big sister or is that a little mommy?

At first Brooke didn't like Colton and tended to act like he was not there. As time has passed she is now a concerned and caring big sister. She insists on giving him his binkie and making sure he is in his crib when she thinks he is suppose to be there. If she can not see him she calls out "Brother, where are you?" Its the cutest thing! I know that as he grows and is able to respond to her that she will enjoy spending time with him and teaching him everything he needs to know about how to be a Barney!