Three puzzles that are like CrossFit for your brain

From top to bottom: Cast Rotor, Oka Craft Yosegi Kuzushi, Oliver String. (Travis Rathbone/) The Rubik’s Cube gets all the attention, but the colorful toy isn’t the only baffling mechanical puzzle out there. Here, you can find the right level of challenge to match your solving skills. Easiest Claim victory over the roughly 6-inch-tall Oliver […]