Rounding demonstration to grasp the concept: Hold a balloon with all five fingers. "Release one finger at a time, then ask does the balloon go up with 1 finger, the reply is no it stays the same. This continues until you release the fifth finger. Then the balloon goes up. Therefore 0-4 stay the same, then 5-9 round up." - For the Kids via Teacher Vision Release the pinky first. Keep your thumb around the twist last. Then, release the balloon!