The Crumbs: Now it's Christmas again (2006)

Krumme argues with his whole class about whether Santa Claus exists. Up at Santa's house, the magic book has disappeared, and that means the end of Christmas. So now Krumme has to prove that Santa Claus exists and save Christmas. But the robbers Boris and Ivan are also on the hunt for Santa's book. All in all, a perfectly normal Christmas at the Krummer family's house.