I have never done something like this before, so I need a little help. Basically what I want to do is build a miniature hover craft, about 8''x3'' if possible. I do not want to propel it forward, I merely want to construct a craft that will hover about half an inch to an inch about a table, being propelled by air. I am planning on using 2 9-volt batteries as a power source, but does anyone have an idea what I could use to generate the air needed to lift the board off the table? Also, will I need anything besides a board, batteries, and energy source?