Signing: The yes sign looks a head nodding yes. You take your hand and make it into a fist, holding it at about shoulder height and make your fist bob back and forth.
Usage: Once baby starts to understand your words, teach yes as a way for baby to signal acquiescence. Ask baby is she wants something, and instead of having baby grab at it, gradually teach her to sign yes.
Flash Card: Click the link to view the Yes Baby Sign Language Flash Card. The flash cards are printable and available in both U.S. Letter and A4 sizes.