Below you can find a link to where you can buy the Feel Flux pipes and magnet (2 pipes one magnet).
This is an affiliate link which means I’ll get small commission if you buy it.
Interesting effect then a strong magnet falls trough a Aluminium or copper pipe it falls very slowly. This are called Lenz’s law. The tubes and ball that are used in the video are named Feel Flux. Fun, satisfying and stress relieving toys.