This popped up during our science hui as something a couple of the other facilitators have used in classes... It's a youtube video: https://www.youtube.com/watch?v=am3iGHDnJHc about a class of Japanese students hatching a chicken without the eggshell.
Besides being an absolutely fascinating video on the development of the chick, I think it's a great video to talk about ethics... Before starting the video, ask the children could you 'grow' a chick in an egg without an eggshell? What issues might there be? Why would a scientist like this?
After children have watched the video, what do they think? What questions do they have? What comments would they like to make? It would be an interesting discussion to let loose! An integral part of science is communication and children learning how to communicate is important... If we're talking as scientists, what could we say -could we say it's gross and you can't do that? Is that a scientific point of view? Can we disagree? How?
When you think about the NZC essence statement about "participating as critical, informed and responsible citizens", how does this fit in? What would it mean to be a responsible scientist?

Have fun!

(picture from http://www.dsm.com/markets/anh/en_US/species/species-poultry/species-poultry-chickquality.html)