Amy Grant is what many people would call 'The Mother of CCM' (contemporary christian music).
J.S. Bach's "Fugue #2 in C Minor" from The Well Tempered Clavier, Book 1.
Well apparently the Olsen twins sang a song called "I am a Kid" and Demis Roussos sang a song called "When I am a Kid" but I'm wondering if you're thinking of "I'm just a kid" by Simple Plan because...
Who are the past keyboard and/or piano players in Amy Grant's career?
Yes, Amy Grant does have kids. Amy Grant has three children of her own and two stepchildren through her second marriage.