My DD(20months) never took to signing either but could sign one sign (milk) very very early - the girl knew what she wanted! From there I let her watch baby signing time occasionally but instead of doing the sign she learned to say the words. She would sign while saying the word sometimes but she just wasn't into the signing. We took a baby signing class and by the end she was saying twice as many words as signs taught. So, in short, I DO suggest doing it with her even if she is not signing. She may surprise you and start speaking the signs you teach (say the word while signing it). It is a great way to spend time with your baby. By 12 months my DD was saying 25 words and over 25 animal sounds and combining words together. I know this isn't extreme compared to some of the very gifted kids here, but the Ped. was pretty darn shocked and impressed nonetheless. I am sure the exposure to signing helped because she was saying (and using correctly) THOSE and other words. Hope that helps!
