I put DS2 necklace on when he was 5mths and haven't taken it off. It did occur to me it might be a hazzard, but I tried it on his ankle and it just kept on coming off and if I kept on putting it on and off I would eventually forget to put it back on and it would be useless. So I left it on. It has been safe on him so far...I tuck it into his singlet and pj's (a bonds jumpsuit most nights). It hasn't ever fallen off and if it breaks, it's individually knotted one so the beads are less likely to fall off.