LEGO isn't the only snap-on brick system that's on sale on Prime Day. Sure, most people would rather build with LEGO bricks than with Mould King or Kre-O, but there's something fun and subversive about these alternatives, and they tend to be much cheaper than the real thing.
I'm not saying you should mix faux bricks with your legit LEGO collection or use the two together—I have standards—but check out these interesting not-LEGO sets that are on sale for Prime Day. They dare to go places LEGO does not.