She is expecting her first child with boyfriend Simon Konecki.
A source said: ''She has been playing the rhymes to her belly."
''It's so Adele can get her voice as close as possible to the baby so it can hear as many soothing sounds as possible.''
And whilst women tend to experience food cravings when they pregnant, Adele craves for board games instead.
A source revealed to The Sun newspaper: ''She's become a bit obsessed with board games. She loves Jenga, Monopoly and Scrabble. Her mate recently bought her a charades set too.''
Writing on her website last week, Adele said she was ''over the moon'' to be starting a family.
She said: ''Im delighted to announce that Simon and I are expecting our first child together. I wanted you to hear the news direct from me, obviously we're over the moon and very excited but please respect our privacy at this precious time. Yours always, Adele xx(sic)''