A cube and a ball, a cube and a ball …. I saved you the long process of construction of this long chain formed by approximately 750 magnets, the sounds were too loud and do not fit an ASMR video. Let me know if you like the video or please give me some suggestions to improve with a comment.
I used magnetic cubes and magnetic balls of 10mm .
Here are the product links
10mm spheres: https://sumag.net/k-10-c-x02
10mm cubes: https://sumag.net/w-10-n-x01