Bigger cube for bigger skills.
If a Rubix Cube isn’t hard enough for you then give this a try. YJ Moyu 13x13x13 Speed Cube Puzzle will test your skills, patience and determination. It’s the world’s largest in production speed cube and is destined to put even your smartest friends to the test. Expect smooth turns and challenging times, so get ready to challenge your friends and co-workers with this one. Actually, you might not have time to go to work tomorrow after all.