Hi, my little girl is in year one, she was 6 in March.
The school are planning on showing them a video next week that the parents were told was "about the difference between boys and girls" and we were told it was part of the science curriculum. We were asked if we would like to see it,and a few of us went along. WELL! This video is more like sex education. It talks about men and women "using their sex parts to make babies" and it also states that "a girls clitoris and a boys penis sometimes goes hard" and that "it feels nice".
Now, I am far from prudish, and I am open and honest with my child, but I (along with a few Mom's that saw the video) think this is far too much information for children aged 5 & 6. I personally believe this is encouraging the sexualisation of children and I am very angry that when we asked the teacher before seeing the video, we were told categorically that it was not sex education...this is why so few of us went, as the teacher was so nonchalant about it. 
May I ask, when did your child start sex ed in school, and do you think this is too soon?
Many thanks.