Ho Ho Ho! This week on the Naked Scientists we're celebrating the festive season in style, with a party right here in the studio. From Christmas crackers to Brussels sprouts, we'll be looking at some of the science behind Christmas. We'll be learning about snowflakes and how these sub-zero designs are created, we'll find out what your choice of Christmas card says about you, and we'll reveal the best way to cook your sprouts, ensuring your family get all the nutrition they can this Christmas. Also, in Kitchen science we'll be getting you to butter bread and throw it off your kitchen counter in the name of science!