For children who find math difficult or frustrating, or who just like to be challenged, there are many cool math games online to play for free. But are they useful? Research shows that the brain’s ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The brain twister that is the Rubik's cube has not only befuddled many people that have tried to ...

The Rubik's Cube dates to my childhood, when it was for leaving on a desk to be fiddled with — or, for a select few strange birds, for actually solving, sometimes very quickly. At that time, knowing ...

Editor’s note: This story originally appeared on The Washington Post’s Kids’ Post page of stories for young readers. WASHINGTON — If you’ve ever tried to solve a Rubik’s Cube (and, like most people, ...

If you suspend a Rubik’s Cube near the corner of a room and shine lights at its exposed faces, it will cast square shadows on two walls and the floor. A real-world Rubik’s Cube has a gadget at its ...

An engineer noted for his ability to visualize three-dimensional structure was having coffee and doughnuts. Before he dropped a sugar cube into his cup, he placed the cube on the table and thought, ...