I agree with the last two comments about baptism. Yes faith is required, but there are several levels of faith. There is the faith of the Brother of Jared, which was so great that he was able to see the Lord face to face. But on a much smaller level there is the faith of a child that is usually small but often times very pure and real. I also agree that children are often times underestimated with their knowledge and ability to learn and understand. The thing is, everyone is different. The Lord didnt require the people he taught to be all knowing or scholarly, he told even those who had only a desire to believe to follow him and they were baptized. For some people the Lord has given them the opportunity to be baptized at age 8. To others he has given the opportunity to grasp the gospel at an older age. These are things we don't fully understand because God is all knowing and he knows what each of us need at different times in our lives. With that given I think that faith is required for baptism, but it depends on what we define as faith.