Every year, I use men's silk ties to color some eggs. They come out differently every year. Here are the ties I used this year. I scour yard sales to find them inexpensively. Our friend Amy has given us some she's found secondhand too.
Here are the eggs, all wrapped up and ready for boiling.
And ta-daaaah! Here they are!
For anyone who'd like to try this, here is a tutorial. You don't need the vinegar or oil for it to turn out. I've never used either.