小鸭子儿童乐园littleducks.cn

Hush, little baby, don't say a word, 
Mama's gonna buy you a mockingbird. 
And if that mockingbird don't sing, 
Mama's gonna buy you a diamond ring. 
And if that diamond ring turns brass, 
Mama's gonna buy you a looking glass. 
And if that looking glass gets broke, 
Mama's gonna buy you a billy goat. 
And if that billy goat won't pull, 
Mama's gonna buy you a cart and bull. 
And if that cart and bull turn over, 
Mama's gonna buy you a dog named Rover.