Alex was definitely trying to keep his brain on the Max problem.

He tried to focus on something, anything, to keep his brain functioning.

You could keep your brain on one train of thought.

Fitness may help keep your brain sharp as you age.

Never trust anything that can think for itself, if you can't see where it keeps its brain.

More than that, you kept his brain from getting damaged.

It's even providing some sort of energy to keep your brain functioning.

The point of the game is to keep the player's brain young using these educational puzzles.

Cold water, though, can keep a man's brain on ice.

Keep your brain on its toes by getting it to do something new today.