A'ight, lil homie, lemme break it down for ya: Quantum theory is like a gang of tiny dudes kickin' it in Atomsville. They're so small, you can't see 'em with a regular microscope, but they're there, doin' their thing, yo.
And get this - sometimes these tiny dudes act like waves, and other times they act like particles. It's like they're playin' a game of "which one am I gonna be today?" But get this, when we measure them, we influence which game they play, and we can't predict which one they'll choose. It's like they're playin' a game of dice, and they're rollin' it up real good.
And that's just the tip of the iceberg, lil homie. There's a whole buncha other things goin' on in Atomsville, like entanglement and superposition, but we'll save that for another day, fo' shizzle.