Kiran is a four-year-old girl who has only ever eaten sweets. She wears the clothes of a one year old and is falling behind in almost every aspect of development. In desperation, mum Sophia has started to force-feed her child. Jo also meets eleven-year-old Bronwyn: a girl who hates her appearance so much she is unable to lead a normal life. Bronwyn cries daily about the way she looks and compares herself harshly to celebrities in magazine, and mum Emma has no idea how to cope.

Jo meets two families at the end of their tether. In Glasgow she visits Madison, a nine-year-old beauty queen who has always been given everything she ever wanted. But her family have paid a heavy price for such largesse, both financially and emotionally. In Blackpool, Jo meets Bailey, a ten-year-old-boy who spends up to 80 hours a week playing online computer games, while his Mum struggles to cope with two demanding younger sisters.

In Middlesex she meets a family struggling to cope with seven-year-old Regan, who has recently been diagnosed with ADHD. In Manchester she visits Josh, a ten-year-old boy already classed as obese. And in a revealing study, Jo investigates how young girls really feel about their bodies.

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In Woolwich, Jo visits six-year-old Paige, who has never slept a full night in her own bed: meaning that her mum hasn't had more than four hours uninterrupted sleep in over six years.

Working with the UK's leading expert in child sleep issues, Dr Cathy Hill, Jo wants to find out what effect having less sleep has on children. Jo also meets four year old Michael who rules the family roost. He has learnt to play his parents against each other and scream until he gets whatever he wants - but as he prepares to start school is it too late to instill discipline?

Six-year-old Jack has his mum bruised, battered and defeated by the battle he wages at bedtime, and he's not afraid to take a swing at Jo. For superhero fan George, ten costume changes a day is a way of life - now he can't concentrate at school and is falling behind.

Nine-year-old Max hasn't eaten a hot meal in his life. Existing on a diet of custard creams, he has no energy and is unable to concentrate at school. Trenyce is bullied at school. Sad, angry and unable to ask for help, she makes her family pay for it at home.

Madison's mum and dad have sought advice from just about everyone to help cope with their six-year-old daughter's tantrums. The couple are separated, but live just a few houses apart. Bedtime is scary for Layla - so scary that in all of her five years she's never slept a night in her own bed. She creates such a disturbance that she gets into mum and dad's bed. With her baby brother already there, and her younger sister following her, no one gets any sleep... not with five in a bed.

There are tantrums aplenty with young brothers Tashan and Diaan, who are so unruly their mum thinks boarding school in India may be the only answer. Three-year-old Grace picks holes in her face while she sucks her thumb and her parents have tried everything to address the problem.

Around a million children are being raised in step-families and it's not always plain sailing. Jack, Chloe and Demi have big problems with their stepdad, and the feeling is mutual, with mum Maria stuck in the middle. Five-year-old Corey has elevated temper tantrums to an Olympic standard and the decibel levels are wearing down everyone at home. But is Corey the worst offender?

Jo Frost runs into major tantrums in this show when she meets 11-year-old Josh, who has a furious temper that's turning home life into a battlefield. Josh's relationship with his dad is proving hard for both of them, and something has to change. Oliver is a dawn-raiding biscuit bandit whose early morning missions disrupt the whole house. Not only are mum and dad exhausted, but when Jo examines the dangerous lengths this five year old will go to for treats - it becomes obvious that it's time for action.

Jo catches up with families to see how they've coped since she first answered their pleas for help. Six-year-old Paige had never slept a full night in her own bed, leaving her mum exhausted. Ten-year-old Bailey spent up to 80 hours a week fixated on fantasy computer games. Madison was a pageant princess on stage and a mini diva at home. Mum found her excessive designer lifestyle draining - both emotionally and financially.

Jo Frost catches up with three families to see how they've coped since she first answered their pleas or helps.