String up a Snowflake Garland: This is a great way for little kids to practice their scissors skills and for big ones to show them off. Have them fold squares of paper in half diagonally, then in half one or two more times so they end up with small triangles. Then draw shapes around the edges and cut out. Unfold the papers and press flat. Once you've got a bunch, string them up to hang on the tree, the mantel, or over a doorway. Have a toddler? Let him "decorate" the paper with crayons, markers, or stamps before you make the cuts.
Unleash their Inner Van Gogh: Fill up a few spray bottles with water and various shades of food coloring, then send the kids out to create their masterpieces in the snow.
Celebrate the Festival of Lights: Have your little one make a handprint menorah: Dip each hand in paint; ask your child to overlap his thumbs (this will create the center candle) and then press his hands, with fingers spread, onto paper. Wash hands, then have him dip a finger in yellow paint and dab the top of each candle to create flames.
Glacier Jump: Toss a bunch of pillows on the floor. Each player must jump from "glacier" to "glacier"without falling in the "water". If she does, she's out. With each round, move the pillows farther apart until everyone is sunk.
Make a Snow Globe: You'll need: a glass jar with a tight-fitting lid; a plastic figurine; waterproof glue; distilled water (you can also use boiled and cooled tap water); liquid glycerin (available at crafts stores); glitter. Let your child pick out the figure, then glue it inside the lid and let the glue dry. Fill the jar with water, a squirt of glycerin (it helps the glitter swirl), and the glitter. Screw on the lid tightly, then flip!