Here is another gravity defying toy that can teach you a thing or two about physics. The Levitron Ultimate is an anti-gravity UFO spinning top that remains stabilized in midair thanks to the gyroscopic effect of spinning. It comes with weights, top, and lifter. The base needs to be perfect level to pull this off.
The Fascinations Levitron Ultimate uses neodymium iron boron magnets for levitation. The above video shows it in action.