How can I make a real lightsaber?

First, we’ll need to score some Kyber crystals.....

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I'm about 99% certain that if it was possible with current science and technology, someone would have figured it out. For now, we have green screens and video editing. Just use a brightly colored broomstick and edit the light saber into the video after. 

These days they are called lasers.

if you had enough midi-chlorians you would know this answer.

i am not allowed to share more.

or the force will fall out of balance.

(once again)

first you have to get one of those crystals and then it has to accept you. but before that you ahve to defeat the an army of imps, and get into the secret passages and solve various riddles

I knew this one kid, surname "Knight". His dad named him Jed I.