JaneJudge
snowberryZ
I don't think he should go.
He always looks miserable and tired when he's attended other events.
Of course the poor little mite could just have a naturally 'sad' expression. Some people do.
this made me laugh 
I think he does naturally have a sad expression. I have one too, so people are always telling me to cheer up, when I'm perfectly happy! He also has shadows around his eyes, but his paternal great grandad (George VI) have those, also Great Uncle Edward XIII did too.
As for them going to a state funeral, I am hoping that their parents will have talked them through the whole procedure and decided their attendance is preferable to them being elsewhere and worrying about what was happening. Maybe there is a Nanny, or Catherine's mum, around in case they became too upset. I hope so anyway.