Though real Christmas trees are wonderful, not all of us have the time, space, or energy to deal with them. So if your tastes lean to the more industrial, minimalist side of things, you can make your own little Christmas trees out of cement. These concrete Christmas trees are reusable, require no maintenance, and you don't have to worry about ornaments or lights. Of course, there's no reason you can't have both a real tree and some of these mini ones. They're pretty quick and addictive to make, so go ahead and make a whole forest.