I wish this was there when I was a kid. Google Body Browser is a perfect tool which lets you explore and understand how Human Body is built layer by layer and which body parts are located where making it a perfect tool to be used with Kids at home or in School.
Google Body Browser is basically a WebGL application which runs on power of a browser instead of using any plug in. So all you need is go here and start exploring. The best part of this is the search. You can type in the body part you need to look at and it will give you instant result. Just go up and down and it will quickly take you there. Amazing Work here.
And here is video with full details :