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Newsweek article about "mommy and me" courses.

A decade ago Patricia Kuhl, a professor of speech and hearing at the University of Washington and a leading authority on early language, proved that tiny babies have a unique ability to learn a foreign language. As a result of her well-publicized findings, parents ran out to buy foreign-language tapes, hoping their little Einsteins would pick up Russian or French before they left their cribs. It didn't work, and Kuhl's new research shows why. Kuhl put American 9-month-olds in a room with Mandarin-speaking adults, who showed them toys while talking to them. After 12 sessions, the babies had learned to detect subtle Mandarin phonetic sounds that couldn't be heard by a separate group of babies who were exposed only to English. Kuhl then repeated the experiment, but this time played the identical Mandarin —lessons to babies on video- and audiotape. That group of babies failed to learn any Mandarin. Kuhl says that without the emotional connection, the babies considered the tape recording just another background noise, like a vacuum cleaner. "We were genuinely surprised by the outcome," she says. "We all assumed that when infants stare at a television, and look engaged, that they are learning from it." Kuhl says there's plenty of work to be done to explain why that isn't true. "But at first blush one thinks that people—at least babies—need people to learn."