Use your leftover 2x4s, a hammer & nails, and some spray paint to create a wooden Christmas tree. To create, first cut pieces of 2×4 in varying sizes. Leave a tall 2×4 (this piece can be as tall as you want, just keep in mind that this will be the height of your tree, the one below is 24-inches tall) to act as a support system. When the cut 2x4s are stacked onto the long spine, it should look like a tree! After cutting, coat your 2x4s in various colors of green paint. Let dry, and hammer to complete!
Photo from In The Country Garden and Gifts.