All it takes is an item of your choice, several colors of sharpies, and some rubbing alcohol. L chose to do a Tshirt this time around.
Put the area you want to color on top of a solo cup and rubber band it for stability. This just keeps the sharpie from bleeding through to the other parts of your shirt.
Draw a circle, or flower, or whatever suits your fancy.
Then, using an eye dropper, drop the rubbing alcohol over your design and watch it spread.
How cute is this design?