This drawing explains the parts of a rocket using only the 1000 most common words:  http://xkcd.com/1133/

It is not very scientific but it is funny.  I hope you like it.

(I found it on  a blog from NPR.  Here is that link: http://www.npr.org/blogs/krulwich/2012/11/19/165469300/why-not-say-it-simply-how-about-very-simply?utm_source=NPR&utm_medium=facebook&utm_campaign=20121119)