loves these keys. Before he was teething he use to enjoying playing with them, and now that he's begun to teeth they're even more useful. Unlike many freezable teethers, they have a portion that is solid plastic that remains at a normal temperature after they're out of the freezer. He really likes this because it allows him to hold it himself without freezing his little fingers off! Also, they're not as bulky/thick as other teethers and he seems to have an easier job getting them where they need to be on his gums. As a bonus, they're super cute :) I'd definitely recommend these.