We all miss one or two life lessons. Some people, like Lifehacker reader izzysanime, never learned how to blow up a balloon. It’s actually kind of tricky until you learn it! So we’ll teach you.

[Let’s Print] has been fascinated with creating a 3D printed axial compressor that can do meaningful work, and his latest iteration mixes FDM and SLA printed parts to successfully inflate (and pop) a ...