Frost the entire top of the sugar cookie with the blue frosting and spread some little spots of green around on it to resemble land. It should look like the earth.
Pull apart 7 oreo cookies gently so that the cream stays on one side of the cookie. Set another cookie aside as it will remain closed.
Now set the Oreo cookies around the earth, putting the First Quarter at the top and going around in the order in step 6.