As you are bathing, diapering, dressing, or holding your child, talk about body parts. At bath time, say things like, "Let’s put soap on your hand" or "Let’s rinse off your legs." As you are dressing your child, say things like, "Put your head through the hole." Talk about your own body parts, too -- as your child reaches out for your face, identify what he is touching.
Sing songs and use different vocal tones.