Heart Cam....

This is a free Augmented Reality app which allows you to "see" straight into your friend's body and watch their virtual heart working - but you do have to download the "trigger" image from
http://tinyurl.com/heartCam

Great to use for the Stage 2 topic The Human Body...or writing activities.
Plus the kids think it's really gross - in a good way!

There's also a very nice heart transplant interactive site (complete with sound effects) which also seems to appeal -