Hi pf, I am trying to get a fun experiment for a science fair at school and would greatly appreciate some help. I have found the experiment I want to do in the video below (43mins 50seconds in). The school has a large aluminium plate so that is sorted. What I am having difficulty with is getting a coil to show appreciable levitation and without stopping it getting really hot (and even smoking). What kind of coil does the professor use so that it doesn't heat/smoke? Also, I am driving the ac with a school power pack which is why I don't think I am getting that much levitation. What device is he using in the lecture and are they easy to get hold of? Any help/guidance is much appreciated!