THESE TOUGH RUBBER TOYS ARE GREAT INTERACTIVE TOYS FOR BOTH YOU AND YOUR PET TO HAVE FUN. PLIABLE, RESILIENT NATURAL RUBBER HAS PROVEN ITSELF TO BE THE BEST MATERIAL TO SATISFY THE DOG'S NORMAL CRAVING TO CHEW. THESE BOWLING PINS HAVE A SQUEAKER SO YOU CAN SET IT UP AND KNOCK IT DOWN. DON'T SPARE THE FUN!