Take advantage of the snowy weather and use it as a theme for learning like Marie over at Make and Takes did. We love the printed paper she used for her mittens, plus your kids get to practice letters and words.
Put letter stickers on the mittens and depending on the age of your child, you can do a number of different activities with the letters. Marie goes into specifics over at PBS Parents.
They're so cute, we would leave them in a basket on the coffee table or dining table for a quick game whenever the mood strikes.