Andy was a real puzzle to Sarah. Sarah had noticed him her first day at her new school.

Andy looked like any other kid. But he sure didn't behave like any other kid. Every day at recess, Andy spun his yellow frisbee. First he picked a flat spot on the playground. Then he set his yellow frisbee on its edge. And with a flick of his fingers, he made it spin around and around and around.

Around and around went the frisbee. Around and around and around all recess long.

Sometimes Sarah saw a girl with Andy, a girl named Rosie. Sarah figured that Rosie was Andy's sister. Except for Rosie, Andy always stayed by himself, spinning the yellow frisbee around and around and around.

What, Sarah wondered, was going on with Andy and his yellow frisbee?

Sarah zipped her backpack closed, pulled it on, and went out to the playground for recess.