I am close to one of the children in the next series and i want to clear up that the child i know is not at a private school, he is quite intelligent, but not a 'genius' child, there are others more intelligent. He/she is also not at a stage school, just at an ordinary state school. People may say that the show is biased towards the kids, but the only reason that is, is because they have learnt it more recently than the adults so it would be fresher in their minds. As you said that the more intelligent contestants get their questions wrong from just not remembering it from when they were 10. The fact that some children get their spellings wrong could be a number of reasons, the pressure of being on the podium, they may be dyslexic or maybe they're just not sure of how to spell it. some kids get their answers wrong when they are needed, and i know for a fact that all the children find it humiliating more than anything, and some may even get upset because they will be on TV in front of many many people, and they want to be the hero of the show. When people automatically think these kids are chosen because they are overly clever, or have been told the answers i find it is unfair as the children work very hard on, and off the stage, especially during the weeks they are filming. They are not told what the questions will be on, so have to revise everything they have been taught. Some of the contestants, I have heard, go out and buy revision books for the age groups so they can still have as good a chance of getting the answers right as the children if they do enough work. It is not set up, and they choose the contestants on how entertaining they are rather than how clever or not they are. hope this clears things up.