K.S.
My son was only a couple of months old when he started sucking his thumb, which it didn't last long at all. I gave my son a passie. I would rather him suck on the passie then his thumb because I can take the passie when he is ready. YOU CANNOT TAKE THE THUMB AWAY. My doctor said that if he is going to suck his thumb there is NOTHING you can do about it. My cousins baby never had a passie and she does nothing but suck her thumb when she is sleepy and/or cranky. I hope you have better luck than she did.