"But we haven't any sand pile here," Margy pointed out. "So we can't make dirt pies in them."
"We can fill them with water. There's lots of water. You push that button again, Margy, and let some more water run."
"But you mustn't spill it on you. You know mother said you shouldn't," replied the little girl.
Margy was, however, quite as pleased with the wax-paper cups as Mun Bun was. When one cup was full, Mun Bun took it and set it carefully down on the floor. Then he reached for another. He actually forgot he was thirsty he was so much interested in filling and stationing the cups in a long line on the floor.
The porter had left his station in the anteroom and did not see what the two children were doing. And the rest of the Bunker family were so much engaged at the other end of the car they quite forgot Margy and Mun Bun for the time being.
"Get another! Get another, Margy!" Mun Bun kept saying.
Margy reached down the cups until there was not another one in the rack. And by that time the ice-water dripped very slowly from the faucet. The tank was just about empty.
"I guess we have got it all, Mun Bun," said the little girl. "They are all full."
"And I didn't spill a drop on me," declared the little boy virtuously. "So mother will say I am a good boy, won't she?"
Just what Mrs. Bunker might have said had she come upon the little mischief-makers we cannot know. For it was the colored porter who was first to discover what the smallest Bunkers were doing. He came back from the other end of the car, smiling broadly at Mun Bun and Margy when he saw them. The two stood to one side and looked rather seriously at the tall colored man. Somehow they felt that perhaps their play would not entirely meet his approval.