I used FolkArt Enamel paint to create the ones you see on the blog. These are found at craft stores such as Michael's and JoAnn's. They run around $2 per paint so be sure to keep your eye out for those 50% off coupons. Just follow the easy directions on the back of the bottle- some require heating in the oven, air dry for days, handwash only. Make sure you protect your work surface and clean up any spills right away as the enamel paints aren't easily going to come off when dried (or not at all).
Here is a link to Micheal's with more information on the paints: