KONG Low Stuff Crackle Tummiez’s crackle and squeak sounds entice dogs to play and are designed with less stuffing for less mess. A flat shape engages natural shaking instincts for dogs of all sizes and reinforced stitching makes for long-lasting indoor fun. Crackle and squeak sounds entice play. Less stuffing for less mess. Flat shape engages shaking instincts. Reinforced stitching for long lasting fun. Ideal for indoor fun.