Wiffle ball is a baseball variation in which players use a perforated plastic ball. Unlike a regular baseball, the Wiffle Ball is hollow, lightweight, made of durable plastic, and no thicker than 1/8 inch (3 mm). Half of the ball’s surface is covered with eight three-quarter-inch-long holes, whereas the other half remains unbroken. The ball was originally created to ease the arm of a rookie baseball pitcher, achieving a curved trajectory without having the pitcher to add spin or hurl at full speed. For a straight ball, the holes should be pointing toward the pitcher’s thumb; for a curve, the perforations should be toward the outside of the pitcher’s fingers. Using this design, pitchers are able to unleash a wide range of curveballs and risers.