Model rockets are about the best things on Earth, second only to Super Mario World, of course. This Bullet Bill DIY rocket combines the two in an unholy matrimony. The entire construction process is documented over on Instructables. Word of caution: It’s not the easiest thing to build and is probably the wrong first model rocket project. Start out with some hobby store kits first. Or just jump in the deep end and build this sweet, sweet Bullet Bill rocket. The worst thing that could happen is it blows up and, well, that’s potentially awesome, too.