In a worldwide school event organised by the BBC, children are saying what matters to them.
Hundreds of schools around the world are taking part including the world's biggest school in India - with 42,000 pupils!
Set up by the BBC's World Class website, the event helps different schools to learn about each other.
We want to know what you think. Send us your comments on the form below !
Is there something that matters to you that you think no one else cares about? Or maybe you've already done something about an issue that affects you. We want to know the things that really matter to you
If you send us a comment, it may be published on the Newsround website, and some comments may be used in our TV bulletins. We'll use your first name and your home town to show that it's your comment; your personal details won't be used for anything else.