Just pop the little paint pod out of the jar and put it in a paint spot in your palette. I got this one at Hobby Lobby - it has a lid that will seal.
Fill about half full of water and the pod will start to disolve in about an hour
After a couple of hours, it will look like this
It will fill the area and will eventually dry hard and you simply wet it each time you want to paint!
Here's a link to the palette that I used, you can buy it online! Sealed Plastic
I'm thinking it could be fun to do a little watercolor painting mixing regular watercolor paints with Twinkling H20s. But you could also make regular patterned paper sparkle just by swiping a few brushstrokes across the top.
And here's my painting - totally twinkling H20s. This is my 3rd watercolor painting. I think I might just like this!!!