Wally had to be pretty patient and skillfull to sculpt those little mutant snow checker men with those big mits of his. He’s had a lot of practice making snowmen as is seen in many strips, which isn’t always possible in Antarctica, only when sticky snow is available. Often it is so dry there that the snow doesn’t even stick or pack together. When visitors or residents of Antarctica make snowmen, they have to destroy them and spread the snow back out after they are done because Antarctica is suppose to always be left looking untouched. So snowmen don’t really live forever in Antarctica, unless they hide.