LEGO's upcoming Game Boy set just leaked—dropping October 1 for $59.99 with 421 pieces, making it LEGO's first-ever handheld console build.

If you're a fan of the Mario Kart games, this is a great set to put together. And at just $19.99, it's one of the best budget LEGO sets you'll find. We built this set for its launch, and it ...