This isn't a quick project, but if you love the classic video game Space Invaders as much as you love chocolate, it's definitely worthwhile. Instructables member AwajiMan shows how to make these astronomically delectable-looking filled chocolates in nine easy-to-follow steps.
You'll need invader molds to do this, of course, but the Instructable links to where you can get them. You could just make these as straightforward molded chocolates, which would omit a few of the interim steps, but we love the idea of filling these with anything from nuts to candied fruit. Yum!