Why try and indoctrinate them at such a young age? Do you fear rejection?
I think you have things exactly backwards...Its those who insist on creationism or ID being the only feasible explanation for life on earth, that fear the teaching of evolution will cause their children to question their religious faith...its as if, they think, that no one can maintain a religious faith, and still support evolution...they do seem to think, narrowly, that one can support only evolution or only God, but never the two together...they have a great fear, that in questioning their religious beliefs, they will reject those religious beliefs....
To me, thats one great big mistake...
Do you fear that having them learn well-established science will weaken their faith? Perhaps we should avoid teaching the germ theory of disease too, after all if we examine the bible epidemics appear to be under God's control, and not happenstance determined by sanitation and luck.