i mentioned this a while back, i think, but haven't had a chance to try it until now (gotta love summer vacation!)
Thanks to Heather for introducing it to me...8th grade physical science...gotta love it!
materials needed:something white (I used a towel i had on hand)
and...
Directions:1. Lay out
dixie cups across the counter and place towel or shirt over the
dixie cups wherever you want the "tie dye" parts to be.

2. Use Sharpies to draw dots (or whatever design you desire) on the material on the openings of the cups.
3. Drop rubbing alcohol in the center of the image. The alcohol will draw out taking the color with it! Add as much alcohol as desired. The more you add, the more the image will spread out.

4. Allow to dry completely (do not remove the cups until the alcohol has dried).
5. Place item in the dryer for 20 min to let the colors set in. Then wash and dry as normal.