This new gentle vibrating tool can be used for oral motor input, in or outside the mouth. Provides a vast array of sensory stim--even though its only the size of a thin ballpoint pen! This latex-free wonder comes with an inter- changeable "Probe" multi-textured tip. We also carry 3 other texturey tips: a round-style "Preefer" tip that's ideal when a rolling action is desired, a "Mini" tip--a smaller version of the popular "Probe" tip, and "Bite 'n Chew" tips that promote biting/chewing and improve jaw strength/stability. Replacement batteries are sold separately. One tip is recommended per child. *Please note that Probe, Preefer, and Mini Tips are sold individually, while Bite 'n Chew Tips come in 5 packs.