Big Bird: The Biggest, Baddest Bird on Sesame Street

[Rebelgium]

A nice project I think you should see.
It's a good example how to build a decent (aka not-broken-in-5-minutes) hovercraft. In the movie you can see that the control isn't really finished though, but the floating is great .

http://www.bradleyp.com/BigBird/Big_Bird.html