The origin of the words to the Three blind mice can be found in English history. The 'farmer's wife' refers to Queen Mary I, a staunch Catholic. Mary got the nickname 'Bloody Mary' for her persecution of the Protestants in England. The 'three blind mice' in the song were three Protestant noblemen who were convicted of plotting against Mary, who had them executed.

Three blind mice, three blind mice,
See how they run, see how they run,
They all ran after the farmer's wife,
Who cut off their tails with a carving knife,
Did you ever see such a thing in your life,
As three blind mice?

Levels K/1/1.5/2 are all in 6/8 time.
Level 2.5 is a funky Callypso (Carribean) sheet music version in 4/4 time.
Level 3 is a Bossa Nova (Brazilian) arrangement in 4/4 time.