KONG Cat Infused Bobble Mouse ? Bursting scent of catnip entices play ? Entertaining wobble action for batting fun ? Bell ball and fluffy catnip tail for added excitement KONG Infused toys are designed using a KONG unique blending process that ingrains catnip into enticing toys arousing cats? curiosity and natural hunting instincts. The KONG Bobble Mouse delights cats with bursting scents of built-in catnip and entertaining wobble action for unpredictable batting fun. The internal bell ball and fluffy catnip tail heighten play sessions adding to the excitement.