Mr Blair was speaking during the weekly prime minister's questions

The prime minister told MPs the internet "bestowed enormous benefits" but it was crucial children were helped to use the internet safely.

"It is important we make sure we do all we possibly can to protect children who maybe gaining access to unsuitable material," said Mr Blair.

MPs earlier heard kids were in danger from cyber stalking and bullying.

At the first prime minister's questions after the end of the party conference season, Mr Blair was questioned on a wide range of issues from his government's stance on the euro through to foundation hospitals and pensions.

Pension fears

Conservative leader Michael Howard accused Mr Blair's government of losing control on pensions.

On Tuesday, a major report from the Pensions Commission warned that more than 12 million working people were not saving enough for their retirement.

The commission, chaired by former CBI head Adair Turner, said a mix of higher taxes, more saving and a higher average retirement age was needed to solve the UK's pensions crisis.

In the Commons on Wednesday, Mr Howard told Mr Blair: "It is time to stop talking and start taking action."

But the prime minister countered: "The Tory record on pensions was abominable, in terms of pensioner poverty, mis-selling and provision for the future."

On the euro, Mr Blair said that the government's policy remained the same - in favour of joining subject to the right economic conditions.

He added that a referendum vote on the single currency would be "binding".