A new smile!
The tooth fairy pillow.
There is some money in there, you just can't see it! The fairy left a dollar coin, as well as some coins from around the world. She must get around!
ETA: In case you're wondering, here's what the tooth fairy wrote!
I heard you lost your first tooth and came as quickly as I could. I was very excited to visit your house and meet you (even if you were sleeping). My name is Pearl and I am your tooth fairy!
Thank you for leaving me your tooth. That was very kind and generous of you. What a shiny white tooth it is too! I love such a beautiful tooth like this one is. I bet you took good care of it. And your little tooth fairy pillow is so cute. I found it right away.
I am taking your tooth back home with me to use in special fairy magic. But I am leaving you some very special fairy treasures in return. That is how tooth fairies work, and now you know.
I will stop by again when you lose another tooth!
(your tooth fairy)