Feast with the king by Francesca Simon

Hack and Whack babysit a toddler – Fire Hazard – and discover to their horror that they might not be the worst Vikings in the village after all! Then they manage to secure an exciting invite to feast with the visiting king, but discover that it’s three days of having to be on their best behaviour – until the new teenaged king turns out to be a lout! Food fights ensue, and he loves them. Unfortunately, that’s when the snotty, privileged, wealthy winter guests turn up – distant cousins who can’t be turned away. They make everyone’s life a misery – can Hack and Whack find a way to get rid of them?