Sensei Cube RX with FREE Playable Keychain Cube & Pouch + Bonus Puzzle Cubes Solution Guide #1 Best Seller | Unique Cube Set- set comes with Sensei Cube RX, playable keychain cube and travel pouch + bonus solution guide; making it the best speed cube deal on Amazon for the smartest shoppers. Sensei Cube RX- premium stickerless cube with new anti-POP/LOCK structure; giving you the fastest speed cubing experience available. Brain Power- develop and train your problem solving skills with these 3D puzzles. Perfect for beginners and experienced cubers. Use the solution guide to unleash the puzzle solving genius within you. Eco-friendly materials- engineered with Earth friendly materials. Fun | Perfect Gift for Kids & Grand kids- relive those nostalgic moments of the 70's & 80's. Play with and challenge your friends today!