Thousands of people have been marching through London on Saturday to protest against child poverty.
Some 120 charities have teamed up as part of something called the Campaign to End Child Poverty. It wants the government to halve child poverty by the year 2010.
One marcher dressed as former prime minister Tony Blair. The current PM, Gordon Brown, has said he wants a complete end to child poverty by 2020.
The Campaign to End Child Poverty says poverty is when a family has less than £10 a day per person to live on.
Campaigners say that across the UK, more than 550,000 children are living in families that are 'struggling'.