You can also purchase them directly from the My Baby Can Talk site. Also check out fun resources on the site featuring detailed tutorials, background research and a video dictionary.

"Our phones are just going crazy," said Kathleen Waidhofer of Monterey, Calif., co-founder of My Baby Can Talk videos. "People will want to teach their baby to sign if they actually see a baby ...

Talk to your baby bump often: In the womb your baby's hearing gets stimulated by around 20 weeks or so. That's from when you can talk to your baby and introduce her to the world of words and sounds.