Appointment with Eternity #5

This is another reason why I try to ask the million-dollar question everyday, either with words or Gospel tracts. Here it is: “If you died today, would you go to Heaven or Hell?” Yes, even kids need to know. (See article below.)

Is there an “Age of Accountability” for kids? Is it proper to witness to children?

Some Christians believe in an “age of accountability.” This is supposed to be some God-determined age where God holds people responsible for their sins.

My question: Where is this in Scripture and what exactly is that age?