KONG Sea Shells provide a dynamic chewing experience with a round outer shell that rebounds when squished. Adding to the fun are crackle sounds that reward and delight your dog's natural chewing instincts. KONG Sea Shells offer wave after wave of fetch for interactive play or a chewing experience that offers an ocean of solo play. Crackles when crunched to satisfy natural instincts Easy to grab legs, ideal for tug, toss and fetch Durable shell springs back for captivating chew sessions Designed for light to moderate chewing. For tough chew sessions, try KONG rubber toys. Supervised use only. Remove all packaging. Discontinue use if damaged.