How do you make a hoverboard?

Go to YouTube.com/watch?v=W4N-CLPXF8w">http://www.YouTube.com/watch?v=W4N-CLPXF8w
This website will show you how to make a hover-board but if this doesn't work out for you then you could make your own way of riding on a hover-board like using 2 engines etc.