I know this isn't a Nativity, but I wonder if this concept would work for one - I love the items stuck in the top - a star and an angel would be just right up there.
DIY Christmas Craft Tutorials,diy christmas craft ideas for kids kids
DIY Holiday Framed Ornament Wreath ( Welcome Home Tour) - Artsy Chicks Rule®
Créer un lampion photophore avec un pot en verre | Idée Créative
Reindeer - So cute! Cut out pieces and let children glue them together.tho they probably won't look like this lol
Think of all the ways you can decorate your home with these adorable DIY porcelain holiday tree lights. Source: A Beautiful Mess
Greeting Snowmen - Sugar Bee CraftsMake fun Christmas decoration using pallet wood, some paint and some fabric. This is so easy and looks great on your porch or inside. A DIY pallet project you can handle!