This is a wearable Arc Reactor I designed in blender to look similar to the prop used in Avengers Infinity War and Endgame. I used solutech white pla for the bottom piece as well as the top piece that houses the leds and painted the finished part with metallic acrylic paints. I used clear solutech pla for the glass sections with two different infill setting to create a cool appearance whether the leds are on or off. The two parts are held together by neodymium magnets. The top piece of course rests outside the shirt while the bottom piece is under the shirt to hold it in place. The magnets were purchased from walmart's website here:
To give the clear plastic a blue glow, I simply printed out a light blue square image on an inkjet and cut it to shape.