I had a quirky idea: I created a simulated black pepper shaker. This model requires only two colors and no glue; it uses internal gears that collide with the inner walls to mimic the sound of grinding black pepper. However, no pepper comes out no matter how much you twist it—yet the satisfying “crackling” sound is incredibly stress-relieving, making it perfect as a prank gadget to tease your friends.

        The model stands 15 cm tall, and we recommend using wood filament or printing in a deep brown color for a more realistic look.