Choose a medium-sized beach ball.

Write (with a permanent marker) the numbers from 0-10 covering the entire ball.

Toss the ball to a student.

After catching the ball, the student looks at the two numbers that are touched by his/her thumbs.
The student must  multiply these numbers.

The answer must be given within 10 seconds.

Before the game starts, decide which two fingers will be used, and which math operation will be used :
(division, addition, subtraction, multiplication).