Materials
4x4 piece of plywood
Rubber lining
Rubber cylinder
150 inches of metal wire
Nuts & Bolts
Leaf Blower
Curtain
Safety Regulations in the United States
Procedures
Take the plywood and cut it into a perfect circle that measures 12.566370614 ft2 .
Drill a hole (the diameter of the rubber cylinder), 6 inches from the edge, this will be where you place the rubber cylinder.
Drill a smaller in the center, this is where you will put your nut & bolt.
Now take the rubber linning and secure it tightly around the circumference of your circular piece of wood.
Take the wire and put it inside the small sleve that is wraps around the curtain, make sure the circumference of the cutain is just a bit larger than the wooden circle.
Align the center hole in the wood and the hole in the middle of the curtain and fasten them tightly together with your nut & bolt.
When operating a craft as an all-terrain vehicle on land it may be necessary to check with your local municipality to discuss the use of your craft to insure you are not inadvertently breaking any rules. For example, most communities do not allow all-terrain vehicles to operate in neighborhoods, or on city streets.
If you must travel to and from your home, by way of the road to reach your deployment destination, you may be breaking a law in doing so. This will differ in practically every city in the country, and should be examined thoroughly before operating the vehicle.
Some cities may require that the vehicle be registered with the Bureau of Motor Vehicles prior to its operation, which may include the necessity of a license plate or identifying accreditation. Check with your local Bureau of Motor Vehicles for clarification. Some regulations may include, but may not be limited to, headlights, running lights, a working horn, seatbelts or helmets.
Fit the edge of the curtain (wire already in sleeve), into the indentation of ther rubber lining that goes around your circle. This process is a bit tedious, but you have to do it right otherwise the curtain may become loose and cause your hovercraft to stope "hovering"
Now take your rubber cylinder and fasten it around the bigger hole you drilled earlier.
Take the leaf blower and put it on the end of the rubber cylinder that is sticking out on the top side. You are now ready to test drive your hovercraft.
* Pictures are from, first one on top http://zedomax.com/blog/2006/10/05/ultra-simple-hovercraft-can-lift-several-adults/ and second one in the bottom http://commons.wikimedia.org/wiki/File:Wware_hoverboard_schematic.png