Kids know so much about the internet now that a special campaign has been launched so adults can catch up.
Childnet - who normally work to make the net safer for kids - want to teach parents about file-sharing, downloading and what's legal and what isn't.
Some parents have been given big fines because their kids have illegally downloaded tunes without them knowing.
A recent survey found 50% of children asked had shared music, but only one in 10 parents knew how to download.
Childnet has put together a leaflet explaining how downloading works and will make it available in record shops, supermarkets, schools and online.
File-sharing - which is sometimes called P2P or peer-to-peer - means connecting to the internet and then taking files from another computer connected as well.
In the past people have downloaded lots of music through file-sharing without paying, but didn't realise that in some cases they were breaking the law.
Downloading music isn't completely illegal though, providing proper legal download sites are used to get the tracks from.