Thanks to Dolly Parton, each of your children can receive free books for kids every single month -- from birth to age 5! Here's how Dolly Parton's Imagination Library works, how to sign up, and one mom's review of the free kids books her child has received.Thanks to Dolly Parton, each of your children can receive free books for kids every single month -- from birth to age 5! Here's how Dolly Parton's Imagination Library works, how to sign up, and one mom's review of the free kids books her child has received.