Speed Cube: Roxenda Profession 3x3x3 Speed Cube - Fast Smooth Turning - Solid Durable & Stickerless Frosted, Best 3D Puzzle Magic Toy - Turns Quicker Than Original
Rubik's Phantom, 3x3 Cube Advanced Technology Difficult 3D Puzzle Travel Game Stress Relief Fidget Toy Activity Cube, for Adults & Kids Ages 8 and up
Amazon.com: Rubik's Cube | 5x5 Professor's Cube Colour-Matching Puzzle, Highly Complex Problem-Solving Toy : Toys & Games