Thank you! I did some research after posting this and also called my pediatrician who said it was fine to try it as long as I got the ankle bracelet or wrist bracket instead of the necklace to prevent choking.

Look up scientific articles on them. There nothing in science or medicine that says they do anything.. And putting jewelry on your kid is a huge hazzard

We have one and I started putting it on him around 3 months. Just recently he discovered it and started putting it in his mouth so I took it off waiting to order a shorter one. Well this weekend he got teeth. So he hasn't been wearing it for about 2-3 weeks. I wouldn't say that he's been extra fussy, maybe harder to put to sleep but I've been blaming it on new found energy