I made some glow-in-the-dark Space Invaders earrings on the MakerBot yesterday!
First I created cylinders in Google SketchUp that conformed to my ear size. Then I modified an existing Space Invaders design to be thinner and smaller using MeshLab. Finally, I printed out the designs using black ABS for the posts and glow-in-the-dark ABS for the invaders and glued them together with plastic model glue.
No luck photographing them glowing in the dark, I’m afraid. Here we go, I used the tips on this site to photograph the glowing effect: