My sister Michelle has quite the entrepreneurial resume. About 10 years ago, she took her academic knowledge of language acquisition and tied it to her (then burgeoning) knowledge of parenting to create a novel way for people to teach hearing infants and toddlers to communicate via sign language. It turns out that infants and toddlers want to communicate and can, cognitively, but their weak throat muscles frustrate their efforts. Michelle turned this insight into a series of books, family materials, and classes that are now taught throughout the country through a program called “Signing Smart” and at Kindermusic under the name “Sign & Sing.”