Make a doll template with winter clothes (paper doll style). Take a picture of childs face and cut out for personalized skiers. Have a class race! This is a fun activity to link up with the Winter Olympics.
Clothespin Math on a clothes hanger! Easy to make, and self explanatory. I'm thinking a wire clothes hanger would work better, so the clothes pins are easy to slide back and forth (almost like an abacus).