LED Star
thingiverse
Same as the heart I guess. This will go on a costume for Comicon so I will post the pictures once available. I jammed 12 LEDs in the back there but it makes the back bulge out a little. Just to clear things out I could only fit 11 holes for LEDs the 12th is basically on the back of the middle one. In between each point at the base there is a 2.8mm hole and i used one of those to fish the wire through. It works on 9V battery and i used 270Ohm resistors for each 2 LEDs. And I used lots of hot glue with a glue-gun, to both hold everything in place but also to insulate the wires so they don't touch.
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