The program is a mailbox club that was originally created as a follow-up for one of CEF's evangelism curricula. It has grown to 255,000 people in 130 countries! (Get more info on their website.)
After you sign your child up, CEF will send your child a short lesson which they complete and send back. As soon as CEF receives the first lesson, they send out another. This gives your child not only fun work to do at home, but a reason to be excited about going to get the mail! My oldest is going to feel so grown up when she receives that mail just for her. Thanks, friend, for the tip!