Babies begin to speak at different ages. You can begin signing with your baby at any time. You will notice your child taking an avid interest in your hand movements. However, it is important to remember that the motor skills of a child, which are necessary for him/her to sign back, only mature around 10 months of age. Always begin with a few words and actions that represent objects that your baby is interested in, as this will enable him/her to focus. Maintain a strong connection between the sign and the word so that once your child learns to speak, she/he will have already learned that words and signs are interchangeable.