What a resource -
http://www.bbc.com/earth/story/the-making-of-me-and-you
This BBC link is a springboard to some fabulous human body work. The possibilities are endless but we've spent a couple of hours on some unstructured exploration:
Weight, convert between imperial / metric
Finding out height, team work required!
Big numbers - what's a trillion, what's an octillian
Imagining 2000L using water bottles
Microbes - how many and what are they up to?
How much our organs weigh & does your soul weigh anything?
Percentages - how much of you is water
Elements, which interesting things have you got in your body
