By popular demand (one person wanted it), here is the instructable on a sombrero boat! Made out of cardboard, this is simplicity itself! Thanks, http://how2dostuff.blogspot.com for the instructable.
Step 1: The Beginning
1. Find a box, the bigger the better, refrigerator boxes work well, and can be found outside the dumpsters of most home improvement warehouses.
2. Find some tape, duct tape will work the best.
3. Destructure the box and lay it flat.
Step 2: Hamburger Fold
Fold the box hamburger style.
Step 3: Fold the Corners
Fold the upper left and right hand corners down and tape them, making a shape that resembles a house.
Step 4: Fold Up the Open Side
Fold one ned of the open side upwards, then the other, like in my Paper Hat instructable. The guy is standing up on it just to keep it down.
Step 5: Halfway There..
Fold the flaps back over so that you can see the top triangle of the boat from both sides.
Fold the leftover box flaps over so that a triangle is formed. Tape those flaps down.
Open out from the middle and flatten the opposite way, this may take some serious beating up of the boat, but make it work so that it is in a diamond shape.
Step 6: Getting There
Fold the bottom point of one side up to meet the top point, once again, you'll have to show the box who exactly the boss is. Proceed to tape it down.
Step 7: You're So Close Its Driving Me Crazy
Flip box over and repeat. Open box out from the middle, flatten it out if you can, otherwise just beat the crap out of the open end until it looks like a boat, use more tape for added flavor, decorate, name your boat, have a mexican sombrero-boat party, send your dog sailing, etc.
Step 8: ALL DONE!
Enjoy your sombrero boat! Perfect for the next katrina, or just to look sweet!