As much as I loathe modern-day Silver Dollar City--they've done away with pretty much everything that would interest Makers--they have this area that my kids were nuts for.
I can't find any good videos. It's all shakycam, or people focused solely on their kids. I didn't get any video, because I was having too much fun.
Those guns have a hopper you can load with those tennis-sized balls.
Those hoses take the balls up to the upper levels where there are more ball guns. That contraption with the hand crank also takes balls up to the upper levels.
Kids will put balls in the intake, and they blow around in that globe for a while. Occasionally it'll blow a load of balls out at everyone inside.
It's not worth going way out of your way for, but if you're a midwesterner and have kids that like to play with such things, eh, it's all right.