RE: Advice needed badly!
I would recommend teaching them to use their dominate eye right from the beginning. They will thank you for it later in life when old age starts to change their eyesight. It will be a lot easier to make the switch right now instead of when they are 40+. I shot with my right eye ( even though I am left eye dominant) for 20 years. Made the change to left handed when I was 45 and haven't looked back. I wish I would have done it sooner!!