After reading some studies of cognition in young children, I take back what I said about philosophy classes for children in public schools. They could handle it. All it takes now is someone passionate about philosophy to come up with a curriculum for the county I work in.
One note--you never know who will become the next great biologist, so if I can peak the interest of someone who had never taken an interest in biology before, then I feel that I have done a good job.
Also, if I were forced to teach ID along with evolution, the philosophical underpinnings of science would be an absolute necessity for the students to make a "fair and balanced decision" on which "theory" is more "appropriate"!