A rollable pet toy is provided forming a skeletal ball that contains a simulated mouse, bird, or other small prey type animal. The skeletal ball provides a rollable form factor while still providing significant access area through which the pet may paw at or access the internal volume. The simulated mouse, bird or other small prey type animal, contained within, is visible and partially accessible. The simulated mouse, bird or other small prey animal is pivotally attached about an axle that is secured on each end, and is further motorized about the axle in a manner that the simulated animal can be made to move such as bobbing up and down. Additional movements, such as head bobbing for and back, or side to side, may further be incorporated. Sound emanation from a prerecorded sound chip may be further provided. Added olfactory stimulus, such as catnip or other herbaceous materials, may be further molded into the skeletal ball structure or contained within the simulated animal.