Remember using food coloring to "color" daffodils when you were a kid? I always thought it was amazing. I recently picked a few blooms to show the kids.
I'm not sure how amazed they were but I still think it's pretty darn cool.
Have you never done this? Go pick a few daffodils before they are all gone! Fill a vase with water, add a few drops of food coloring (I have the best luck with blue and green), trim the stems to allow for better water absorption and wait a bit. I think it will also work with daisies and carnations.
Next experiment — try for two colors.