Author:Beyer, Monica. The ultimate guide to baby sign language, with color photos and 200 signs!You can hearyour baby can hearso what’s the deal?. Research (funded by the National Institutes of Health) has found that signing babies: talk sooner and have larger vocabularies; have stronger parent/child bonds; have less frustration, crying and tantrums; show more interest in books; engage in more sophisticated play; and have higher IQ scores.