My son always wants to chew on my keys when he's teething. It's nice to have something durable & safe for him to chew on!
My 1-year-old daughter loves my car keys and whenever she finds them, she puts them in her mouth immediately... so she needed her own set of keys! While she likes to jingle these keys and she occassionally puts them in her mouth, they are not quite as satisfying as the real thing. That being said, when were in the car and she needs her own keys to play with, these are perfect. I was hoping she'd love to use them as a teether as well, but she is just not interested in keeping them in her mouth (like she would like to do with my actual car keys).