One of the reasons the Flat Stanley Project has become the longest-lasting literacy project on the web is due to the simplicity of the concept. Kids send a flat visitor to a school, a celebrity, a family member, a politician or anyone of interest and the recipient returns the little flat guy along with a completed journal and perhaps some souvenirs such as post cards, photos, or special items.
To arrange exchanges you can add your name to the List of Participants either as a classroom or a homeschooler. Those on the List will have access to others on the List so you can make contact and arrange exchanges. Alternatively, you can arrange your own contacts.
The site offers flat character templates that you can use or you can create your own. The site also offers a free blog account where you can add your own text and images for the world to see.