Igloos are cool. What kid hasn't wanted to build an igloo? You can easily build an milk jug igloo in your classroom with some planning, lots of milk jugs and hot glue. This could be a fun winter craft for the kids when it's too cold to go out.
I really need to share this. Plasticdragon by ~toge-NYC Traditional Art / Sculpture / Fantasy ~toge-NYC A Dragon made entirely out of Plastic Kitchen Utencils (Spoons, Knives, Forks and cups glued together using a glue gun)