Discover how to build a homemade fog machine in this step-by-step guide using everyday materials like PVC pipe, a hair dryer, ...

Instead of throwing that spent Elf Bar nicotine vape into the trash, you can pull most of the guts out, plug in a circuit board and some controls, then suck on the mouthpiece to play digital sounds.

You’ve heard of wind tunnels– get some airflow going over a thingy, put some some smoke on, and voila! Flow visualization. How hard could it be? Well, as always, the devil is in the details and [toast ...