Give each child a picture showing an outline of a snowperson. Have each child color the snowperson to look like himself, then cut it out. Attach each snowperson to the bulletin board with the child's name. Include a heading such as "The Happy Snowpeople of Room Three!" Glue cotton balls along the bottom to look like snow.
Cover the top half of the board with cutouts of small snowflakes. Don't make them any bigger than one to two inches in diameter. Arrange them randomly a bit apart from each other as though they are falling from the sky. At the start of each day, move one snowflake to the bottom of the board--this flake has hit the "ground." Have the children count the number of fallen flakes each day. You can keep this board in place throughout the entire winter so the children can count how many days long the season is.
To make a spelling-themed bulletin board, cut out dozens of small snowflakes and write a letter of the alphabet on each one. In order to be able to spell most words, make at least two snowflakes for each common letter in the alphabet. Attach the letters around the outside edges of the bulletin board, and write "Our snow word of the day is..." in the center. Each day, let one child pick a snow-related word. Have the children guess what letters they think belong in the word by sounding it out. Spell out the word in the center of the board with the letter snowflakes.
Make a snow village scene on the bulletin board. This idea also works well for a door decoration as it takes up a lot of space. Cover the top third of the board with blue paper to represent the sky and the bottom two thirds with white for snow. Include some snow-covered trees or a skating rink. Add three-dimensional "snow" by gluing on pieces of cotton. Cut out penguin figures and attach one child's face to each penguin head. Position the penguins all over the snow. Write the heading "These kids are snow cool!" across the top.
Cut out a large snowflake like the one in the Printables section of the Scholastic website. At each of the snowflake's points, attach the names of the children who are helpers that week or have other classroom jobs. You can also use this display to show which children are scheduled for something special that day such as speech or physical therapy. Have the children cut out their own small snowflakes to display around the edges of the larger one.