Everyone loves that Olaf the snowman, so find imagery that you like and modify one of the cute catch phrases from the movie. I have used:
Some Parties are Worth Melting For, followed by the party specifics.
This is the time to pull out those dusty boxes of christmas ornaments! Anything with a snowy village motif is usable; snowmen, snowflakes or anything with a crystal/ice look. Make your own snowfall, with paper, glitter and glue and enlist the kid's help. Before you know it, your walls and windows will be looking like a blizzard.
If you have any princess decor (castle pieces, banners, etc.) throw those into the mix as well.
One of the decor elements that I added to one of my larger parties, was to take twinkle lights and string them in front of a mirrored wall. I then hung a curtain of very thin, shimmery, white fabric in front. The effect was pretty spectacular...but be warned, it took hours to achieve.
Ever wonder what a dessert table made by a former rocket scientist would look like? Like this. Cake table created by our friend Bethann and her company Studio Cake, absolutely incredible work!
A bag of powdered donuts with a little tag that says, Edible Snowman! Warm hugs not included. Those come from you!
Photo snow globes
Warm Mittens filled with treats.