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Hello, before we get started, I need more of your radical questions for a man who is at the forefront of the movement to ban social media and smartphones for children.

Professor Jonathan Haidt is the author of The Anxious Generation and is deeply concerned about the impact technology

is having on young minds. This is your chance to ask Kim your burning questions about this

defining issue of our times. Look, if you care about kids, social media and smartphones,

if perhaps you're part of the campaign for a ban, if you like the idea of a ban, but fear it just won't work in practice.

Whatever your take, we want to hear from you, and so too does Professor Jonathan Haidt.

You can send us a voice note on WhatsApp 033-12394480 or email Radical at BBC.com.

That's your radical questions for Jonathan Haidt about social

media, smartphones and the backlash against big tech. Now, on to this week's episode.

Hello, it's a mole here. Welcome to Radical. These are conversations about the trends changing our world and offering you some radical ideas for the future.

Now, there's a lot that goes into the editorial choices. We make the reason that we choose particular subjects, particular guests one week or another.

And sometimes it's just what

we think is the most interesting. Sometimes it's what do we think is the most important. And today,

we've decided to put the focus on fostering. And we've done that because according to

children's charities and the fostering network, there is a fostering crisis in England, which is putting huge pressure on

private residential care homes. Did you know there are more children in care today in England

than there have ever been? And at the same time, the number of fostering households is falling

fast. And this is something that is front and centre of government thinking, because in a couple of weeks, there's going to be a major government announcement on fostering and we thought we should try to get ahead of it. We're going to discuss the root causes of all of this, what can be done about it, what the government is planning to do, what it needs to do, and offering them and you some radical ideas. And I should say that this is one of those episodes,

one of those weeks, frankly, which has been a really exhilarating learning curve. There's a lot in

this which I just didn't know and I wish I had known because the fact is when it comes to foster

care, which is related to but different from the issues around adoption, this country has a crisis

...