Hi there,
I realise you wrote this post way back in October, but I was just wondering if you ended up finding someone to look after your children?
If you still need, I know someone who is looking for childcare in Luzern. She is a lovely, well educated person, with a medical background and knowledge of many languages & much experience with children.
I would be more than happy to give you her details via PM (personal message).
Best regards
JAPP