Funny flashing balls: these pet elastic balls are designed in LED flashing style that they will glow and flash colorful light when being hit, and last about 12 seconds, which can arouse your dog's interest and attractive its attention, these glowing balls work well in the dark, making it easier for your pet to find them, providing it with funny experience for training and playingReliable and durable: these cat glowing spiny balls are made of quality TPR material, which is soft, tooth-friendly and reliable for your pets to bite and play, not easy to fade and fray, durable and reusable for using a long timeAttractive gifts: these colorful pet glowing elastic balls can be applied as nice gifts for your beloved cats and dogs, helping them grind and clean their teeth, you can throw these balls out and ask your pets to bring them back, which can deepen the bond between you and your petsGood elasticity: these LED flashing spike pet balls feature good elasticity that they can bounce up and down flexibly, you can interact with your pets to train their ability to run and jump, making them active and keeping them healthySufficient quantity and different styles: the package contains 4 pieces LED light up dog balls in smooth type and spiny type, 2 pieces in each type, and the diameter of the glowing ball is approx. 5.5 cm/ 2.2 inch, sufficient quantity and diverse styles to meet your pet's daily needs and replacements for playing