Flutterby™! : build a hovercraft

When I was a wee lad, my dad and I started to build a vacuum cleaner powered hovercraft. I remember getting as far as three disks of plywood with sheet metal edging on them, and we may have even gotten a "t" structure in between 'em, but it kinda fell apart because in that wonderful 200 year old house we had no smooth concrete surface on which to float the thing. The floors, which were big wide slabs of eastern pine, had decent sized indentations in between the boards, and the basement and floors of the barns were unfinished dirt.

Here's a video of a leaf-blower powered hovercraft that's a lot simpler than what we were building. I haven't got the page loading yet, but plans should be here (if you can't figure 'em out from the last few seconds of the video). Still requires a flatter surface than I had back then, but most of y'all don't live way out in the boonies.