Apparatus: Big test tube, delivery tube fitted in a rubber cork, knife, candle, etc.
Chemicals : Sodium metal, ethanol, magnesium ribbon, etc.
Procedure : Take 10 mL ethanol in a big test tube. Cut Sodium metal into 2-3 pieces of a cereal grain size. Put the sodium pieces into the ethanol in the test tube and fix the gas delivery tube to the test tube. Take a burning candle near the outlet of the gas delivery tube and observe.
Why do the sodium pieces appear to dance on the surface of ethanol?

Explanation

The fine pieces of sodium appear to dance on the surface of ethanol because the reaction of sodium with ethanol is relatively slow as compared with that of water and the gas released in the reaction pushes it across the surface of ethanol.