Sarah and Amanda were older by ten and twelve years than their little brother Eugene. They were not jealous of the attention he got as a the baby. They didn't mind that he smelled bad if his diapers weren't changed, or care that he spit out his pureed carrots.
They, as preteen girls usually are, were completely wrapped up in friends and clothes and boys and Hannah Montana.
The few times that they were trusted to watch him, they never noticed that he had taken off to practice his banking and rolls.