The two primary issues involved in magnetic levitation are lifting force: providing an upward force sufficient to counteract gravity, and stability: insuring that the system does not spontaneously slide or flip into a configuration where the lift is neutralized.
This magnetic disc (CLM 2 magnetic levitation module) as shown in the video is huge and powerful and can float objects weighing near 20 pounds.
The magnetic disc is hidden under the chessboard, for instance and we see floating books; a fake book and hid the magnet in it.
Or the pillow; the visual of a floating pillow supporting a 7 pound brick is fun to see.
And then the last one, the Millennium Falcon, so to see it floating just brings it to another level of reality.
Another project is an amazing Water and Sound Experiment.
Turn on the water and watch the magic begin.