Bernoulli's Curve Ball

Using a V shaped handle that is lined with sandpaper you throw a styrofoam ball. The ball curves as it flies through the air due to different air pressure on the sides of the ball. The side turning into the wind will have a relatively slower flow speed and therefore a higher pressure while the side turning with the wind will have a higher wind speed and lower air pressure. Thus the ball curves in the direction of the lower air presure.

Pira DCS # 2C20.60

Styrofoam Balls   Wood Throwing Handle   Sandpaper
Nerf Boomerang