they're for lots of different things, actually. pretty awesome, really.

& this company I bought mine from is legit. so, if you don't feel like doing the research on a different place, this one is good.

@hermommy, they are for teething

@wisconsinmom, yes! they do. If they are real! be ware. people do and will sell you fake ones. there are tests on how to make sure they are real. anyone who buys one I suggest testing it to make sure. one is simple.. just salt and water. you have to see if it floats or sinks. I think floats means it's real but I can't remember. we have had my daughter's for over a year now.

what do they do that's so cool

I just got hers today, so I can't say from experience, but everyone I've talked to swears by them.

considering this! do these necklaces help?