Quiet Ball Whistle

Really loud whistles are great when you need a really loud whistle, but would you really want to give one to your kid? This much quieter toy produces a soft and oddly satisfying thwumpa-wumpa sound as the ball spins around the track. Just print and pop one or two or three (I like the sound of two) balls – 6mm dia. Airsoft BB's -- into the track through the gap in the top. And don't worry - it is impossible to suck the balls back up through the tube you blow on.

The model has built-in mouse-ear brims around the ball opening that you should remove with a hobby knife after printing. I strongly recommend using the provided 3MF file as it has special bridging and seam settings that avoid lumps on the inside of the tube that are impossible to remove.

Design by LoboCNC on MakerWorld (license: BY-SA).