Grannybags. Yes it is lovely. Our granddaughter learned German at school and used to sing it with me 
Why can't I wear this to a wedding?
It's official: Grandparents are good for children
Favourite small treat when feeling blue or conversely a bit flush

Other than that love some carols, Away in a Manger sung by 5 year olds. My absolute number 1, In The Bleak Mid Winter.