Any ideas on spanish lullabies to sing?

hey i work for a couple with a 1 year old boy, his mother is from peru so they will be teaching the boy spanish as well as english, i have been trying to learn spanish, but dont do so well unless i hear how it is supposed to sound so if any one has a lullaby that i can hear and know the words to it that would be great, also any other kids songs too, thanks, your friend, trish