I have designed this for my daughters lantern parade.
It is designed to house an Adafruit Pro Trinket, Adafruit Powerboost 500 C, switch, Micro USB connector, two Neopixel rings and a LiPo battery.
For a complete overview over this project please read my blog article (in German, but could be easily translated with Google translater). This will also list all materials and the wiring.
The star should be printed in thin layer height and less infill to ensure a nice finish and to let the leds shine through. All other parts can be printed in thicker layers to keep printing time short.