So here's what you do...
Preheat the oven to 275 degrees.
Line a muffin tin and fill the cups with broken crans. Get your little helper/aspiring hand model to help you. Try to convince him that you're not really making cupcakes and that you're not going to eat what you're making. Good luck with that.
Bake until the cran pieces are melted, about 15ish minutes.
Let tins cool and pop crans out of the liners. This is satisfying like unwrapping a Reese's peanut butter cup, only not as tasty.
Then color 'til your arms fall off!!
I made mine in a mini muffin tin so they would be smaller and thicker, making them easier for a certain little boy to use, but of course this would work great in a regular tin, too.