Have you ever tried using alcohol inks before? I love it, especially in the holiday time. It is so easy that it is an awesome project even for toddlers (if you are ok with their hands being colorful for a couple of days).
Then you just put a little blending solution onto the ornament (or a tile, like we did later) and start dropping the inks onto the ornament. The more blending solution you use, the more the inks will blend into each other (and the more space they will cover).
It truly is that simple!
Once it dries, it can be washed and it stays on. Just do not put anything edible on it.
We even made some coasters out of 16-cent tiles. We just glued some felt underneath and made a fun holiday-gift for kids’ teachers and parents in under 5 minutes and $1.