Joseph
"Kneeling in Bethlehem", by Anne Weems, Westminster John Knox Press, 1987
This is a book of Christmas poems by Ann Weems. One of her poems asks Why do we put Joseph at the back of the stable? --referring to our cultural tendency to put him at the back of the creche. The book is widely available.
You could read through the poem and discuss it. Give children a chance to arrange a creche the way they think it should be. Then dress in costumes and arrange themselves along the lines of that plan. Take a picture.
For art, check out some art books from the library that have famous pictures of the holy family. How do the artists depict Joseph? old/young? handsome/ugly? Ask the children to imagine what Joseph might have been like. Paint or sculpt a picture of Joseph using the art media of your choosing.