One in five 10-12 year olds with a social media account has been bullied online, according to a Newsround survey.

The survey, carried out by Comres, found that nearly eight out of ten 10-12 year olds in the UK has at least one social media account.

This is despite the fact that many networks say you have to be 13 to join.

The survey asked over a thousand 10-18 year olds in the UK about their experiences on social media.

Twenty-two per cent of 10-12 year olds with a social media account say they've been bullied or trolled online.

Seventy-one per cent of 10-12 year olds on social media said they felt 'happy' when they used it and 76% said it was important to them.

Thirty-seven per cent of 10-12 year olds with a social media account say they've made friends online with someone they've not met in person.

Thirty-five per cent of 10-12s with a social media account say the social media companies don't take bullying seriously enough.

Snapchat wouldn't speak to Newsround about the survey.

Instagram wouldn't do an interview but told us: "Keeping the community safe on Instagram is our number one priority and we spend a lot of time thinking about it... we require anyone on Instagram to be over the age of 13".

YouTube wouldn't do an interview either, but stressed that the site is for people aged 13 and over.

And Facebook said they'd be happy to do an interview as long as we didn't ask them about under 13s, which we wouldn't agree to.