Naughty Elves

I came home from work to find the children were excited about having naughty elves in the house - I think their cousin Lilly and Granny may have something to do with this - I would try and explain this but am struggling to understand it myself. All I know is they have had a spell put on them and do naughty things while everyone is in bed.

Before I went to bed I had to find something naughty for them to do - tonight they raided the advent calendars!