V-Cube 4 pillow 4x4x4 Magic Cube. Black Base | MasKeCubos.com
Rubik's Cube, 4x4 Master Color-Matching Puzzle Bigger Bolder Version of the Classic Retro Brain Teaser Fidget Toy, for Adults & Kids Ages 8 and up - Walmart.com
How to solve the 4x4 Rubik's Cube - Beginner's method