since i don't have kids yet,t he only thing i will add to this talk is a comment about sucking on lips. i sucked on my bottom lip as i was growing and my happily crunchy mom thought it was fine cause it was a natural part of me. well it wasn't, it completely reshaped my jaw tot he point that i could not speak clearly. it took 7 years of ortho works and speech therapy to get my mouth working normal.
i had no known issues prior to getting my teeth in, but once i had them the force of the sucking against them and my jaw growing were at odds.
so just a warning to keep a keen eye out once babies get teeth and please don't think that just because something is not toxic, that it does not have side effects.
ETA: but obviously you should always keep an eye on that sort of stuff...thanks for the reminder why.