Simple Christmas Pyramid

- another christmas / winter themed design
- modeled in fusion360
- inspired by traditional german christmas pyramids (https://en.wikipedia.org/wiki/Christmas_pyramid)
- simple, minimalistic approach
- powered by rising/moving air from a heater / radiator / etc
- do not use open flames!
- uses a small magnet and some steel balls as a rotational bearing
- there are model versions for 13mm steel balls, and 1/2" steel balls ("_inch")
- the arc base structure consists of 3 parts glued togeth