what suggested age to wean off pacifier?

I've always read to wean them off the paci by 12 months but that can be hard to do. (My son is 14 months and still wants his paci for naps) I would say she should be off the bottle by now definately.

I would try getting creative with the paci weaning. I have seen some families send their paci's to the pacifier fairy..they can either hide them under a pillow, put them in the fairy's little bucket, etc. Tell your grand daughter a little story about the fairy and what they do with the collected paci's. Have fun. Reward the child if when they give them up. Think of a special toy, stuffed animal you could give to replace the pacifier.

I've also seen one family tie all the pacifiers to balloons and release them outside.

As far as the thumb sucking...it could be possible that the younger will learn from the older. That can be hard to break. I sucked my thumb until I was at least 9 years old and no matter what my mother, doctor, etc did...and they tried everything...I was not giving it up. (embarrassing to think about now. :) I don't have alot of advice for this. sorry. Just keep trying to discourage it with the older girl. My parents taped socks to my hand, put nasty flavored herbs/spices on my thumbs, made me read books about how bad thumb sucking was, etc. Good luck!