Sorry, I should have clarified my criteria for "songs." The youth choirs are singing Make Me a Channel of Your Peace, and the adult choirs will sing one of the other pieces attributed to St. Francis. All Things Bright and Beautiful is sung every year outside in our playground just before and after we bless our (live) animals.
I am not looking for a hymn, but a contemporary (or not so contemporary) "song" with actions or movements or dance moves for the youngest children of the congregation to sing up at the altar for the rest of the congregation.
We'll all be donning animal masks and will have our resident "rock and roller" dressed as St. Francis to lead us in song. We're looking for pep and joy and humor or at least excitement. Thanks for your ideas.