Thirty Million Words Project shows mums, dads the power of parent-baby talk

There's no such thing as spoiling your child with words, and several projects in the US are teaching parents how to speak to their babies.

On the third-floor hospital maternity ward at the University of Chicago Medical Centre in the US, Bionka Burkhalter had just given birth to her first child, a 7-pound, 4-ounce (over 3kg) boy named Josiah. There was a knock on the door, and two women asked to give a presentation on how to build her baby’s brain.