Simply turn on the leaf blower and hold in an upright position. Explain that, as they each travel through the air, the air that goes over the top must travel faster than the air that travels under them. Bernoulli discovered that the air that travels faster has lower pressure.
Lower pressure is just like a vacuum.
The ball is like th . . . . . . . . . I don't understand how you got such a garbled view of our page. When I look at the bernoulli experiment, this is what it says. Simply turn on the leaf blower and hold in an upright position. Place the ball in the stream of air.