My daughter has loved this toy since she was a month old. Once she developed the social smile, I would catch her smiling in response to the firefly's smiley face.Now she is almost five months old and she likes to grab and chew on various parts of the toy, but does not find the teether particularly interesting.I did give Freddy the firefly a bath in the washing machine in a mesh beg and cold water without detergent, as it makes no sense to give to your child a cloth toy that you know she will chew on without washing it first. The crinkly stuff still works, even three washes later.I am not fond of the mirror. The only thing it has in common with a mirror is the name, otherwise it's just a shiney surface, which, I guess, is ok, since it's a safety mirror on a toy.