Light Up DNA Ball, the stress ball that lights up your life. Ultra soft, flexible, thermoplastic, elastomer ball filled with soft, translucent mini spheres in assorted bright pastels and a LED ball that lights up when squeezed. Pick one up and play. Feel your stress melt away as fingers become more flexible and hands stronger. This light up stress ball measures 2 1/2″ diameter. Available individually and in a 12-pack.