what is the best way to extract hydrogen from water?
Use mostly paper to create these thingsIf your folks will allow it, ask for white card stock from Christmas cards for better stiffnessTransparent tape will help hold them togetherSome small-scale gift wrap could make nice wallpaper Cloth from heavy rags around the house, such as old denim, will make an acceptable carpetUse Magic Markers to draw in windows, light switches, curtains, drawers, books, etcUse any little object to make a bedside lamp, and cut a paper cone for its shade.
It depends: Electrolysis is quite common industrially, but is innefficient and suitable electrodes and power supplys are expensiveIf you have a good supply of red-hot to molten metal, such as iron, handy, it will react with steam to release hydrogenA very fast way for a small volume of hydrogen quickly (like to fill a balloon or whatever) is to react aluminium (foil) with a strong sodium hydroxide solution, and bubble the gas through water to cool it and remove water vapourI did this once to make a garbage bag hydrogen ballon, it worked great.
