Grizzly Bear song teaches dynamic brilliantly. Lots of great music games in one document.
Boom Chicka Boom (Dynamics) | Music Lesson Plan - http://www.makingmusicfun.net/htm/f_mmf_music_library/boom-chicka-boom-lesson.htm
Teaching tempo and dynamics - Music @ Copeland Elementary - CFISD in the hall of the mountain king
"Hickety Pickety Bumble Bee...say your name with me" song
what's your dynamic... volume check for the classroom. I'm making these! Someday!
teaching tempo - lessons I only remember using half of these in band! Lol
Doggie Dynamics Music Bulletin Board Set
Adding animal stickers to music is an idea to reinforce the speed of a song (ex. animals from these photos). Also, stickers of quiet or powerful animals (i.e. panda or lion) reinforce piano and forte dynamics.
Organized Chaos: Teacher Tuesday: dynamics lesson for "too much noise". Use this story to introduce loud and soft, forte and piano, and review classroom instruments and timbre as well.