I think this would be a great table activity in a library following a story time on winter, penguins, owls, or any of the occupations/themes represented by the outfits...Some other ways to use this set:
Have the kids help you dress the critters! Pass out only one item from each outfit, and keep the coordinating items in your hand. Put the snowman on the board and put the hammer in his hand. "Uh oh, this worker has lost her hat! She only has a hammer! Does anyone have the hat for this construction worker?" You could also put all the accessories on one side of the board, and all the hats on the other side, and the kids can come up and make a match... Really, there are tons of ways to use a set like this--I hope you find some that work for you!