Tony Blair became Prime Minister on 1 May, 1997. Press Packers Marnie, Liam, Ben and Alison were born on that day. They've been looking at the highs and lows of his career...
Marnie is from the Wirral in England. Before she had her first birthday, Mr Blair had promised to spend more on education. There were new buildings, new teachers - and more tests!
Ben is from Newport in Wales. When he was two, Mr Blair said he'd make sure that no more kids had to live in poverty. But - in 2007 - some families still don't have enough money.
Alison from Northern Ireland was four in 2001 - when terrorists attacked America. Mr Blair sent British soliders to Afghanistan to try to find the people who organised the attacks.
Liam is from Edinburgh in Scotland. He said: "When I was five, Britain and America went to war with Iraq. Many people say invading Iraq was Tony Blair's worst ever mistake."
Tony Blair brought in a new way of punishing bad behaviour - Asbos. Ben explains: "You could be banned from playing loud music, playing football or hanging around in some places."
When our Press Packers were eight, Mr Blair asked the world's richest countries to give more money to the world's poorest countries. In the same year, he banned fox hunting.
A year later, Mr Blair got his teeth into school dinners. Junk food was replaced by healthy stuff like vegetables after a campaign by TV chef Jamie Oliver.
In 2006, Mr Blair said Britain needed to produce less pollution. Now - after 10 years - he's leaving the job. What stuff should the new PM do? Click on our Chat page to have your say.