Dog Light Up Ball Is Made Of Selected TPR Materials, Which Are Small, Lightweight, Safe, And Not Easy To Bite And Damage The Pet's Body. Has A Bulge Design That Can Rub Pets' Teeth To Promote Tooth Cleaning. Built-in Audible Luminous Device, It Can Bounce And Flash Colorful Lights. It Makes The Dog's Pursuit More Fun, And Relieves Pressure.