This stick is great for a few reasons. It doesn't have the sharp edges and ends that bamboo has. The edges are bamboo are sharp as knives and can give splinters and cuts. The ends, if accidentally thrust straight into something, are ship and have little flexibility and can cause harm.
These plastic rods are blunt, and flexible and are much safer for the barrage. They make the best noise when hit against something. Unlike bamboo, they won't splinter or become brittle and break over time.