All you need to do is upload the plugin folder to your plugin directory and activate to see falling snow on your blog.
Update Jan 30, 2011
Updated the plugin to the latest stable version of the snow script. Added additional options to the plugin admin page.
Update Nov 07, 2009
I have not been supporting this plugin for a long long time, almost 2 years in fact. Since Christmas is round the corner, I thought I should give this plugin a nice refresh. I have updated the snow script to the latest version. Best of all, I have added a plugin settings page so it's easier for those who are not comfortable with tweaking code.
In 2007, WordPress.com introduced a falling snow options for its users after Matt Mullenweg asked for a falling snow script. Because the feature was only available to WordPress.com users and not self-hosted WordPress blogs, I took the falling snow code and made a plugin that exactly the same thing. All users needed to do was to download and activate the plugin to have beautiful falling snow flakes on the blogs.