More than 120 of the world's best Rubik's Cube experts will battle each other and the clock at the Exploratorium.
The time to beat is seven seconds.
"This competition always attracts a lot of world class people. There's been a world record set every time before. There's some pretty fast people and it takes a lot of skill to win,"
Some players will even compete blindfolded.
Cube players say practicing no matter how you do it makes you better.
