These light up bouncy balls are for human fun only! DO NOT give to animals. These light up balls are NOT chew toys. Whether you're a playful child or an adult kid at heart, LED Soft Spike Air Bounce Balls are a good time! To activate your assorted color LED Soft Spike Balls, bounce them. The multicolor lights inside are impact activated. They will automatically turn off shortly after being bounced to conserve battery. Dimensions: Diameter 2.25 in. Assorted Ball Colors: Red, Green, Blue, Pink, Yellow, Purple. Soft Spike Air Bounce Balls come ready to use with non-replaceable batteries. We repeat, NOT for animals - batteries cannot be eaten, please be responsible.