[Axenolith]

Check this out. You built these as a high school project in the first 1/2 of 20th century. You learned and made everything from scratch!

https://www.gasenginemagazine.com/gas-engines/the-ironwood-engine

[lyby]

https://www.oanow.com/news/opelika/sanford-middle-school-to-send-three-teams-to-vex-robotics/article_10e75638-2327-11e7-b3c2-af61e0618b00.html

In the first quarter of the 21st century, this is an example of the projects our students are working on. :-)