In the past few years, we have covered plenty of cool levitating toys, lamps, speakers, and gadgets here. The Levitron is a cool science toy that demonstrates levitation using two opposed permanent magnets. The Levitron floats in mid-air and stays stable through the gyroscopic effect produced from spinning.
According to the manufacturer, the toy continues floating for more than 2 minutes. The above GIF from PhysicsFun demonstrates how the Levitron works.