See Saw

This two-note song is perfect for teaching the concept of high and low, as well as so and mi.
Source: SPU Kodaly Summer Institute, Level 1 Materials

Let Us Chase the Squirrel

Students will willingly sing this song from North Carolina over and over again to get to play the game.  When they know it well, it is especially good for the practice of re.
Source: Ed. by Erdei, Peter.  150 American Folk Songs to Sing, Read, and Play p. 6