Rhythm
Steady beat.
http://www.sfskids.org/templates/musicLabF.asp?pageid=12
http://www.tnellen.com/cybereng/lit_terms/rhyme.html
http://www.youtube.com/watch?v=KUtEg8Qxuxk
http://www.poetry4kids.com/blog/lessons/poetry-dictionary-for-kids/
http://www.youtube.com/watch?v=5xvCOu48GlA
http://www.richardmacwilliam.com/the-drumbeat-poem/
http://www2.nkfust.edu.tw/~emchen/CLit/poetry_language.htm