Our church has a large foyer with floor to ceiling windows. Every year before National Collection Week for Operation Christmas Child, we build two Christmas trees out of shoe boxes. We put an OCC brochure in each one and then our members can take the shoe boxes they want to fill. It is fairly easy to re-make the tree as the boxes disappear, until a large portion of them are gone. We also put a tree in our Welcome Center, as many people enter the church there. This helps us to promote Operation Christmas Child in a visual way and makes it easy for our people to pick up their empty boxes.
I don't know where we originally got this diagram/instructions to build the trees but I'm passing it on to you. It takes 141 boxes to build each tree. We are a mid-sized church and we collect over 2000 filled shoeboxes each year for OCC.
Here are the directions that we use each year. Hope it helps you.