Great for stimulating your dogs natural instincts, senses and mind so that you have a more contented pet. They are designed to help reduce the risk of your pet developing behavioral problems which may stem from fear, aggression or boredom. Environmental material and bright color, very popular among pets, never fade, good to bite. It will make a sound when squeezed, great for fun and entertainment. Help your pet take exercise and develop its intelligence, become more happy and lovely.