eight o'clock
`` If you children do n't make this box lighter at once , I shall have no use for you , '' he declared . And they all , scenting candy with infallible instinct , fell upon it with rapture . They had tea on the lawn , that evening , and , after a consultation with Mrs. Stevens , Bobby 's grandfather sent a message over the telephone that was followed very shortly by a man with ice cream and a huge cake . When eight o'clock came , one of the teachers began to play a march on the piano in the hall . At once the children fell into line , marking time with their feet , and singing , `` Good-night , good-night , Children and blossoms who sleep all the night , Always will wake up happy and bright , Good-night , good-night ! '' As they sang , they marched away to bed . The others followed them in .