An X-Brain yo-yo. Number two of six Yomega yo-yos offered by McDonald's between November 21 and December 21, 2000.
The "X-BRAIN" yo-yo is a plastic yo-yo with a centrifugal clutch, and it works this way: when the yo-yo is thrown hard enough towards the ground, the clutches separate and allow the yo-yo to spin freely. As the yo-yo slows down, springs push the clutches back together until they grab hold of the axle. At this point, the yo-yo winds up and returns automatically to the player's hand.
"With the purchase of any Yomega/McDonald's X-Brain or Firestorm for $2 (food purchase necessary), you could be the proud new owner of a Power Brain. Inside every package looms the chance of winning this new generation of yo-yo."
