he gets off the train with a shoebox full of postcards and that was the start. that s the start. reporter: with the help of his brother, they begin making and selling a new kind of card, a greeting card that you put inside an envelope. all these years later, who is writing them? andrew blackburn, for eight years now. as a hallmark writer, you kind of get into the spirit of christmas a lot earlier than most people do. reporter: his sister, mother and father, inspiration. i love what andrew told us. y. reporter: that it comes from his parents, that s his inspiration. absolutely. unfortunately, we re sold out, because it sold so well. reporter: andrew s parents. they deserve the credit. inspiration, yes. reporter: amy, 12 1/2 years writing. from the writing that i do, the lettering, the illustration, it all happens right here in this building. so, we have amy s card right here. reporter: amy. thanks to you, mom, i always know what matters most. it s true for me,