Based on the observation that the tune for the Alphabet song, for Twinkle, Twinkle, Little Star and for Baa Baa Black Sheep is the same…
Players sit in a circle. The first player starts singing any one of the three songs. When the player stops, the next player must continue the same tune with different lyrics. So, if the first player sings “ABCDEFGH” the next player continues “sir, yes sir, three bags” and the next “star. Up above the sky so…” etc.