The Wonders of the World, the Normal Distribution, and a Children's Math Tool for Learning Normal Distribution

Most things in the world follow a normal distribution and the golden ratio. This utilizes (does not utilize) both.

Normally, a 3mm bullet is sufficient. A printable version is also available. No supports needed.

Previously, I used a 100mm x 150mm acrylic cover plate purchased from Taobao. Anything under 3mm will work. Search keywords such as "acrylic sheet" etc. They cost about 5 yuan for ten sheets. If the card doesn't fit, you can add a component yourself or use UV glue.

The printed parts include spheres, but they don't need to be perfectly made, just functional.

The main reason is that online versions cannot be stored upright. This one embeds into the cover plate. Convenient for back-and-forth movement, and the spheres won't fall out.

It can stand on its own. Holes are also added on both sides. A stand will be added in the next version. If you need a stand, let me know. I'll make one urgently.