"I’m Mary,” my three-year-old grand daughter told us. She arranged a silky scarf over her head and tried to fold her hands piously, but the scarf kept slipping off. She grasped it in one hand and reached for her little brother. “This is Baby Jesus.”
According to the song, "Joseph was an old man" so perhaps Grandpa can have that role in the picture. Nine-month-old Alex was more interested in reaching for toys and standing by furniture than lying in an imaginary manger, so the pose didn't last very long. Forget that “no crying he makes” part.