Is there a specific age of accountability mentioned in the Bible?

There is no specific age of accountability mentioned in the Bible. Until children mature and gain an understanding of what the message of Christ’s sacrifice on the Cross means to them personally and realize their sin and guilt before God, they are covered by the blood of Christ. This principle also applies to those who, while they are mature physically, have never matured mentally. They may be in the body of a mature person, but their mind has been impaired to such an extent that they have the mind of a child.