If you read The Lost Tooth Club, you may have noticed the blurb in the back of the book.
The official Lost Tooth Club badge
I will send an official Lost Tooth club Badge to everybody that writes or illustrates, how you lost your tooth. Many schools have mentioned that they use this as part of their writing and art curriculum. I’ve received over 2000 letters from all over the world.
thelosttoothclub 
We tried to send the picture, but the mail came back, not sure if we had an old address. Could you please send the correct one? My daughter was really excited about getting a badge. Thanks!
Hello Jennifer, Hi, If you email me at ardenpetrov@yahoo.com I can send you my address. Would love to see your picture and send a official Lost Tooth Club badge to you.
Your friend, Arden Johnson-Petrov