Select a week in the heart of winter -- perhaps over winter break, when kids are off school -- to hold a snowy movie fest. Every night, show one or two kid-friendly movies with snow scenes in them in a room in the library. Provide popcorn and drinks or healthier snacks, such as vegetables and fruits. Encourage library visitors to bring their own blankets, pillows and stuffed animals with which to cuddle during the movie showings. When the movies finish, hand out winter-themed library books and encourage the kids to check them out for reading at home.
Schedule weekly or daily story time sessions during the winter to read winter- and snow-themed books aloud to kids. Prepare reading comprehension questions ahead of time and ask the kids to answer them afterward. You can keep kids' attention better if you turn the reading comprehension questions into a game. Have a pile of other winter children's books ready to pass out to the kids after the reading session if any want to read more about snowy days at home.
Ask children to help decorate the library for winter by holding a paper snowflake craft session. Provide white paper and safety scissors. Show kids how to fold the paper and then ask them to cut the paper wherever they like. After they unfold the paper, ask them to compare how different each paper snowflake is. Make enough snowflakes so that the kids can hang their crafts on the library walls and also take some home for themselves.
Find examples of winter-themed poetry for kids and read the poetry aloud in a winter poetry slam session. When finished, ask the kids to write their own winter poem and share the poetry with the rest of the kids. If the children need a little encouragement, print out a list of winter words, such as "snowman," "blizzard," "ice" and "sledding." Cut out each word and shuffle the words face down on the table. Have the kids pick a few words and write a poem that includes all of their chosen words.