The best materials for DIY Halloween decoration projects include paper, glass jars, tree branches, white sheets, and plastic milk jugs. Paper allows easy crafting of shapes like bats or ghosts for wall art and swarms. Jars can be converted into glowing lanterns by adding candles or string lights inside, creating warm ambient lighting. Branches easily transform into eerie wreaths or centerpieces that add natural texture. White sheets quickly turn into classic ghost figures without buying special fabrics. Finally, plastic milk jugs serve as cost-effective, lightweight pumpkin lanterns that line pathways or driveways, guiding trick-or-treaters safely. Selecting these materials keeps costs low, waste minimal, and decorations renter-friendly since many can be easily detached or reused year after year with simple storage.