Lightsaber fridge magnet.
This is designed to print on 2 different plates, one plate for the hilt using the AMS to print the silzer and black. The second plate for the blade so this can be printed in glow in the dark filament (I used geetech blue whigh has worked out pretty well). Of course if you don't want to go with Glow in the dark just print the blade in a nice bright blue/green/red etc.
The blade is a tight push fit into the hilt and then a 4mm diameter magnet by 4mm deep is a tight fit in the end of the blade, no glue needed.