In the video, the baby, who's sitting on the ground playing quietly, raises her hand up in the air and starts dancing back and forth upon hearing her mom sing ... starts to dance side to side.

But none of them are lullabies to comfort crying babies and no one gathers to dance. That unusual ... singing a lullaby to a baby. Northern Aché adults do sing—but always when they’re alone.

For older babies you can sing and make the movements at the ... Make lots of eye contact and try to make your baby laugh with funny dance moves. Let your hair down and enjoy.