阅读下面短文。在短文的空格内填入适当的词，使其内容通顺。(每空格限填一词)
There was once a rich man who loved his little boy very
much. He wanted to try his best to please (使……高兴) him.
So he gave him a horse to ride, beautiful rooms to live in,
pictures, books, toys and everything that money   buy.
But for all this, the little boy was still   . He wore a frown ( 皱眉 ) wherever he went, and always wished for something he did not have. The man didn’ t know how to make his son happy.
One day, a magician (魔术师) came to the man and said to him, "I can make your son happy and turn his frowns into smiles, but you must pay me a great price for  him the secret. "
"All right," said the man, "No matter what you ask for, I’ll give you." The magician took the boy into a secret room. He wrote something on a piece of paper, and then gave it to the   There on the paper came the words, "Do one kind thing for someone every day. " The boy   the advice and became one of the happiest boys.
Only those who stop thinking about their own happiness can be truly happy.