This is diamagnetic levitation. Strong magnets are needed and strongly diamagnetic materials such as pyrolytic graphite. How to buil this experiment? click here https://www.supermagnete.com/Magnet-applications/Graphite-surfer In this video i use these product and magnets: https://sumag.net/dialev-x01 https://sumag.net/q-15-04-04-mn-x01