Over The Top is a world-record 17x17x17 Rubik's Cube. It makes quite pretty patterns. It can take many, many hours to solve. The puzzle was first presented live to the world at at the New York Puzzle Party Symposium, Saturday Feb. 12th. The YouTube video was be published after that event, and the record was accepted by Guinness World Records.
Void 6x6x6 is a twisty puzzle, inspired by Katsuhiko Okamoto's famous Void Cube, a hollow version of Rubik's Cube. This 6x6x6 version introduces a completely new way of turning, in which edges turn into the cube.