'Sana Sana'

Sana, sana,
Heal, heal,

colita de rana,
little tail of the frog,

Si no sanas hoy,
If you don't heal today,

sanarás mañana.
you'll heal tomorrow.

This rhyme is said to have magical healing power.
Parents gently rub or tap their fingers over a cut, bruise, or other injury in a circular motion, repeating the rhyme, and the injured child quickly feels better.
"Sana" means heal.
This song is in De Colores and Other Latin-American Folk Songs for Children by Jose-Luis Orozco.