One brain really works up a sweat to get the job done in this "Weird But True!" video.

Weird But True: Planets
    Weird But True: Planets
    Check out the issue!
      Check out the issue!
      Weird But True: Numbers
        Weird But True: Numbers

        Brain Boosters

        Cool Stuff

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        Maze: Oceans
        Maze: Oceans
        Bubble Burst
        Bubble Burst
        Space Explorer
        Space Explorer