Treat your Frozen princess to a royal birthday affair! If you’re planning a Frozen birthday for her, let Birthday Express help with some Frozen party ideas. Letting the guests look the part with Anna and Elsa costumes is always fun – accessories like sparkly tiaras are also great Frozen party favors. (Or, prizes for Frozen party games!) Hot chocolate with marshmallows serve as perfect refreshments, and crystallized sticks of rock candy make great Frozen party food too.