The core highlight of the Vortex Funnel Piggy Bank lies in itsgravity‑driven spiral track design. Once a coin is dropped into the top chute, it spirals rapidly along the funnel’s edge, creating a mesmerizing vortex‑like visual effect. This process leverages the interplay betweencentrifugal force and gravity: as the coin moves through the funnel’s narrowing section, conservation of angular momentum causes it to accelerate in rotation, ultimately exiting through the central hole and landing in the bottom storage chamber. This dynamic display not only makes saving more engaging and fun but also provides a clear,直观 visualization of the coin‑accumulation process—perfect for helping children grasp the concept of “saving” in an intuitive and memorable way.

Note:

I’ve fine‑tuned the parameters several times—please don’t waste material by pushing for excessively high speeds; it’s better to print at a slower, more stable rate! See the image below for reference!