Toy in a Box - in memory of my Grandpa

This is a patent my Granpa applied for in 1967. It was approved in January 1968. It just was a test how to apply for an patent, he wasn`t intressted in earnig money with it. Once he said to my Dad " I am a Maker, not a tradesman" :D

https://www.youtube.com/watch?v=NUSezMFO4bA

I made my first own 3D-Print-Project, now, nearly excatly 50 Years after the approval of his patent in january 1968. I changed the ladder parts to keap the ladder modular, but made them better printable and stable. I