Because my students are blind, we usually decided to keep a long tail or maybe even two so that they could sing them around in circles (with one hand or two). A jingle bell tied to the center made for another sensory element for these students, and it also made it easier to spot it's location when I added a little tennis lesson to the unit. We took a dry cleaner's wire hanger and bent it into a paddle, using the cardboard tube at the bottom of the hanger as the handle. I stretched some pantyhose over the hanger to make a bouncy and soft tennis raquet. Then I held the end of the string with a yarn ball at the end of it in front of the paddle and had students practice their forehand and back hand motions as they hit the "ball". It worked even better with the jingle bell announcing the moment of contact to the rest of the class. With students who had perfect vision, there wouldn't be need for the long string, and students should be able to bat the pom poms back and forth with a couple of paddles.