No holiday feast at Hogwarts would be complete without magical floating candles. Why should you settle for anything less. The holders are easy and quick to print and allow you to Wingardium Leviosa as many led candles as you need to light your festive feasting hall. The first version is the strongest but requires the candles to be threaded on the fishing line (oh darn, now I've given away the trick) Version 2 and 3 can be hooked anywhere along the line which makes them a lot easier to install but they aren't as strong. Version 2 is best printed with a high strength filament like PETG, while version 3 is beefy enough it should work when printed in PLA.
The candles can be purchased in the darker recesses of Knockturn Alley, or, more simply, from Amazon. I used https://www.amazon.com/gp/product/B00P68DUGW but others of the same size should work as well.
The candles use an IR remote to turn on and off. Around the winter holidays we hang 4 dozen of these above the dining room table. You can hold down the button on the remote and make a grand sweeping gesture to turn them all on or off. Pretty close to magic the first time you do it.
We talked about this and a whole lot more on the 3D Printing Today podcast available on iTunes, or Stitcher radio learn more at http://www.threedprintingtoday.com/