I made a poster with the text of the song written on it and I taught it to my students. 

I brought some instruments and I asked them to sing it.

Before this activity I explained them some characteristics of this small planet.

Mercury is one of the smallest planets in our solar system.

It is also the nearest planet to the sun.
Because Mercury rotates exactly three times every two orbits around the Sun, and because Mercury's orbit is elliptical, a visitor to Mercury might see the Sun rise, stop in the sky, go back toward the rising horizon, stop again, and then set quickly over the other horizon
The temperature on this planet ranges from –315°F to 648°F:
Mercury spins very slowly. The side next to the sun gets very hot before it turns away from the sun. The other side freezes while away from the sun.
As the planet slowly spins, the frozen side then becomes burning hot and the hot side becomes freezing cold.