Youngsters upset by the September 11 terrorist outrages in the US have received comfort from Downing Street.
Pupils at Upper Whitley Junior and Infant School, Grange Moor, sent letters to Prime Minister Tony Blair, describing their feelings.
Now, the 20 youngsters have received a reply from his office.
Head teacher Linda Wigelsworth said the school had held an assembly and classroom discussions after the tragedy.
Pupils wrote down their feelings in letters and sent them to Mr Blair and US President George W Bush.
"They said they were afraid and really sorry about the whole event.
"They also said they didn't want there to be a war and asked the two leaders to be careful," she added.
The school received a letter from No 10, saying the Prime Minister was busy.
But the letters were being handed to the Foreign and Commonwealth Office for the children's comments to be noted.
Mrs Wigelsworth said: "It was a way for the children to learn how to write a persuasive letter. And it was good for them to see that it works."
She said pupils had also discussed the school's own moral code and related it to decision-making in the political world.
"We talked about treating people as you would like to be treated and having respect for other people and their property," she said.
Now, the pupils are hoping for a reply from the White House.