How about picking up an official light saber toy and turning it into something even more impressive.
So watch this episode of Master & Apprentice, where he teaches us how to do it.
The veteran production designer Marcus Gray LaPorte and his apprentice, Adam Ellis, took the time to carefully explain the steps of their lightsaber creation process. The end results left both men happy with their efforts, and the lightsabers truly looked professional.
And if you have the skills, try to do it at home, too. Logically with proper care, and with adult supervision if necessary.