These are always so much fun to make ~ I just did a few for my party yesterday. Since it was a "Bird" theme, I chose the birdhouse cookie cutter shapes and went with a "semi" winter theme.
You do not have to be an artist to paint these, or plan them out ahead. I usually just think of a general theme, occasion, or season and go from there.
Traditional colors of the season.
Really, anything goes.
I've made these for many years and have always used ordinary liquid food color but this time I also experimented with the gel food coloring (in the baking/cake decorating section of the grocery store), and it works great especially for deeper color saturation.
They really are a lot of fun to play around with, and are completely edible.