The sun may be going down, but why should fetch time be over? The Chew King Value Pack Glow Balls keep the fun going by being easy to find in low-light conditions. All it takes is a brief burst of light under a lamp, your car's lights, or even the light on your cellphone and they glow well enough to find in an evening grassy field. These fetch balls are compatible with most ball launchers and a proper replacement for tennis balls, except there's no slobber-soaked felt cover to handle. These dog toys come in a set of 8, so you can pack some in a park bag or glove compartment, leave a few at home, and still never be without a replacement. Bring a set home and let the fun roll on after dark!