Make hydrogen at home with your very own electrolysis machine! This device will allow you to separate the hydrogen from oxygen in water. Try it as a science experiment, to make hydrogen for balloons and airships, or just to set on fire!PRINT: 1 Electrolysis Chamber 1 Funnel 2 Balloon Nozzles 2 Extension Tubes. To ensure al parts are waterproof under pressure, I recommend printing at a higher than normal temperature with a higher than normal extrusion ratio. Some type of sealant may also be needed,especially for the lower portions of the chamber. I coated the entire chamber in ABS glue. PURCHASE: 2 Stainless steel bolts ~5mm in outer diameter Silicone caulking, ABS glue, or PVC glue Party balloons Baking soda or table salt *A DC power supply of some kind BUILD: When all of your parts are ready, put the pieces together as shown in the pictures using silicone caulking to ensure a watertight fit. Use two of the extension tubes to ensure that you have enough water pressure in the chamber to withstand the pressure from the balloons. Screw your two bolts into the holes at the bottom sides of the chamber, and use silicone or glue to seal those holes completely. Label one of your chambers with a "+" and the other with a "-". Now for the fun part! ELECTRIFY: Before you begin, here is a good read on how electrolysis works: http://www.instructables.com/id/Separate-Hydrogen-and-Oxygen-from-Water-Through-El/ Note that the first image in that article reverses the positive and negative signs; don't let it confuse you!