(CBS News) The sight of 3-year-old Kennedy Steele doing a happy dance is something her mother will never forget.
The little girl erupted in glee upon hearing the sound of her mother's voice for the first time. Kennedy, who was born deaf, is one of a small number of children in the U.S. testing a brain implant procedure that allows her to hear.
"It's something I've been looking forward to for a long time," mom Nickia Steele told CBS News.
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