We do need to add ping-pong balls as diffusers before the display will be finished but if there’s a problem you don’t want to have to remove the balls to fix it. Let’s build and test the ...

Next time you’re in a Nerf gun battle, you better hope you’ve got this absurdly powerful ping pong ball gun ... The interesting bit of the build is a de Laval nozzle between the pressure ...

Best Get it from Amazon for $39+ (available in 14 styles). 16. A portable ping-pong set to turn your dining room table into *the* place to hang out (even when there isn't a crumb of food around).