I love doing all sorts of vocal exploration with my kiddoes!
"The Squiggle" by Carole Lexa Schafer is an oldie but a goodie. It's a story of a girl who find a string and creates different shapes and creatures with it.
I read it with the little ones (K or grade 1) and we vocalize the shapes or "draw them with our voice".
After the story, students create their own shapes with a skipping rope or draw them on the board and we try singing their squiggles!
Find the book on amazon HERE for under $7.00!
After presenting the activity this year I also showed 2 videos that reinforce high and low. The videos show excellent visual representation of sound, such as the squiggle activities do.