There has to be room for all the little wheels.

There was a little wheel set into one side of the box with an arrow on it.

I could all but see the little wheels turning in his brain.

After a moment, he grew conscious again of the little wheel.

This little wheel runs true to the other, bigger one.

I smiled as the little wheels started to move in his head.

He paused before speaking again, and she could see the little wheels turning.

Next to her stood a bucket on three little wheels.

It gives me the little spinning wheel and then goes to blue screen.

"I can hear those little wheels inside your head spinning from over here," he told her.