Well, the idea behind the adult version was to show them that they don’t have to eat rubbish all the time, and to make them see that there are people out there to whom this is the only choice of food. If you don’t hunt or gather your food, you go without.
It encouraged the people (most of whom had poor self-esteem) to work as a team, to challenge themselves, and to change their views on food. It seemed to work for most of them.
Now, bear in mind that I only saw two or three episodes of the programme.
I would hope that, for the children’s version, they will also be working with the families at home*, to ensure that this doesn’t just become a holiday from eating as they always did. I also assume they’ve screened the families carefully as to who wants to do this properly, as a way of changing their eating habits permanently, and who just wants to be on TV.
*As they did in a recent short series, I Know What You Ate Last Summer.