Anyone out there know how to tie dye?

I have been Googling, alta vistaing, yahooing all morning looking for instructions on how to tie die a twin bed sheet -- people are more than happy to sell them -- but alas, I have found no instructions for tie dying a large item. I imagine it would be more difficult that dying a tee-shirt. If anyone has a good set of directions or an opinion on how difficult this would be I would love to hear it! I haven't tie dyed since about 1973. I would love to do this for my daughter's room and work on it with her. I plan to make it a duvet cover.

The About.com Tie-Dye How-to page:

http://familycrafts.about.com/cs/tiedye/

I did check them out, but can't find out about dying larger items.

Buy some dye. Get your bedsheet and some rubber bands. In different parts of your bedsheet, pull a few inches of material through a rubber band then twist the rubber band several times around the material both close to the original twist and further up the material. Repeat with more rubber bands. If you do this often enough over all the bedsheet, you'll eventually have something that looks like Medusa's head. Put the dye and however much water it says to use into a bucket and put the sheet in it with something to weigh it down. Leave it in for a long time. Take it out and take off the rubber bands, and voila, you'll have lots of funky designs on your bedsheet. Let dry.

You might google for how to keep the color - what chemicals or whatever to put on it.

TlalocW

Just dunk one of the rubber banded sections in a different color. Repeat as randomly as you like. Accuracy is NOT important as it all looks cool in the end.

This from an old Hippie with much practice a long time ago. Interesting things can be done with wax also. Keeps selected areas from getting colored.