"You're still pretty new to this, aren't you," Rey replied, scratching her head. She put the cane back together, since she couldn't very well ignite her double-bladed saber in a store. Or in public, really.
"Uhm, it's the crystal that makes the lightsaber go fwoom," She added, making a near perfect imitation of a lightsaber sound with her mouth. "They're attuned to the Force and kind of... well they don't talk, they're not alive, but they can call to people. Like hearing a voice across a beach."
She tapped the cane, where she'd hidden the saber, "This crystal used to be yours. Then it was your son's. Then it came to me. But I'm still kind of learning how to do the whole Force thing in my dreams. I was a nobody on a desert planet called Jakku, at the arse end of nowhere. Until I wasn't a nobody anymore."