If you have a little time on your hands and are a huge 'Transformers' fan, then the DIY Optimus Prime Costume is just what you've been waiting for. Instead of spending a lot of money on another costume or scouring the web for handmade ones, you'll have a cheap and true suit in no time.
Made completely out of cereal boxes, the DIY Optimus Prime Costume only cost $20 to make. I suggest starting this project as soon as possible however, because Halloween is closer than you think. Check out the video for full instructions.