Each note and rest is approximately a quarter note or quarter rest. (My timing is off, but this generalization should be enough to get the gist of it.) C is the lowest note, and G is the highest:
C rest E rest F rest F G
C rest E rest F rest F G
C rest E rest F rest F G
C C C
When I was little, I called it the “Buttocks Song” (Butt, butt, butt, buttocks…) for some unknown reason. Obviously this isn’t the real title, though.